feat: enhance DataFrame Operations component with contains filter and modern UI (#8838)

* feat: enhance DataFrame Operations component with contains filter and modern UI

- Add "contains" filter operator for partial string matching in DataFrame filters
- Update UI to use SortableListInput with icons for consistent modern design
- Add 7 filter operators: equals, not equals, contains, starts with, ends with, greater than, less than
- Fix deselection handling to prevent "unhashable type: list" errors
- Improve dynamic field visibility when operations are deselected
- Add comprehensive test suite with 25 tests covering all operations and edge cases
- Update placeholder text from "Select DataFrame Operation" to "Select Operation"

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

* [autofix.ci] apply automated fixes

* Update dataframe_operations.py

---------

Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
Co-authored-by: Edwin Jose <edwin.jose@datastax.com>
This commit is contained in:
Rodrigo Nader 2025-07-09 18:50:59 -03:00 committed by GitHub
commit e0400f29eb
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2 changed files with 504 additions and 79 deletions

View file

@ -1,4 +1,7 @@
import pandas as pd
from langflow.custom.custom_component.component import Component
from langflow.inputs import SortableListInput
from langflow.io import (
BoolInput,
DataFrameInput,
@ -39,12 +42,25 @@ class DataFrameOperationsComponent(Component):
info="The input DataFrame to operate on.",
required=True,
),
DropdownInput(
SortableListInput(
name="operation",
display_name="Operation",
options=OPERATION_CHOICES,
placeholder="Select Operation",
info="Select the DataFrame operation to perform.",
options=[
{"name": "Add Column", "icon": "plus"},
{"name": "Drop Column", "icon": "minus"},
{"name": "Filter", "icon": "filter"},
{"name": "Head", "icon": "arrow-up"},
{"name": "Rename Column", "icon": "pencil"},
{"name": "Replace Value", "icon": "replace"},
{"name": "Select Columns", "icon": "columns"},
{"name": "Sort", "icon": "arrow-up-down"},
{"name": "Tail", "icon": "arrow-down"},
{"name": "Drop Duplicates", "icon": "copy-x"},
],
real_time_refresh=True,
limit=1,
),
StrInput(
name="column_name",
@ -60,6 +76,16 @@ class DataFrameOperationsComponent(Component):
dynamic=True,
show=False,
),
DropdownInput(
name="filter_operator",
display_name="Filter Operator",
options=["equals", "not equals", "contains", "starts with", "ends with", "greater than", "less than"],
value="equals",
info="The operator to apply for filtering rows.",
advanced=False,
dynamic=True,
show=False,
),
BoolInput(
name="ascending",
display_name="Sort Ascending",
@ -126,6 +152,7 @@ class DataFrameOperationsComponent(Component):
dynamic_fields = [
"column_name",
"filter_value",
"filter_operator",
"ascending",
"new_column_name",
"new_column_value",
@ -138,36 +165,57 @@ class DataFrameOperationsComponent(Component):
build_config[field]["show"] = False
if field_name == "operation":
if field_value == "Filter":
# Handle SortableListInput format
if isinstance(field_value, list):
operation_name = field_value[0].get("name", "") if field_value else ""
else:
operation_name = field_value or ""
# If no operation selected, all dynamic fields stay hidden (already set to False above)
if not operation_name:
return build_config
if operation_name == "Filter":
build_config["column_name"]["show"] = True
build_config["filter_value"]["show"] = True
elif field_value == "Sort":
build_config["filter_operator"]["show"] = True
elif operation_name == "Sort":
build_config["column_name"]["show"] = True
build_config["ascending"]["show"] = True
elif field_value == "Drop Column":
elif operation_name == "Drop Column":
build_config["column_name"]["show"] = True
elif field_value == "Rename Column":
elif operation_name == "Rename Column":
build_config["column_name"]["show"] = True
build_config["new_column_name"]["show"] = True
elif field_value == "Add Column":
elif operation_name == "Add Column":
build_config["new_column_name"]["show"] = True
build_config["new_column_value"]["show"] = True
elif field_value == "Select Columns":
elif operation_name == "Select Columns":
build_config["columns_to_select"]["show"] = True
elif field_value in {"Head", "Tail"}:
elif operation_name in {"Head", "Tail"}:
build_config["num_rows"]["show"] = True
elif field_value == "Replace Value":
elif operation_name == "Replace Value":
build_config["column_name"]["show"] = True
build_config["replace_value"]["show"] = True
build_config["replacement_value"]["show"] = True
elif field_value == "Drop Duplicates":
elif operation_name == "Drop Duplicates":
build_config["column_name"]["show"] = True
return build_config
def perform_operation(self) -> DataFrame:
df_copy = self.df.copy()
op = self.operation
# Handle SortableListInput format for operation
operation_input = getattr(self, "operation", [])
if isinstance(operation_input, list) and len(operation_input) > 0:
op = operation_input[0].get("name", "")
else:
op = ""
# If no operation selected, return original DataFrame
if not op:
return df_copy
if op == "Filter":
return self.filter_rows_by_value(df_copy)
@ -194,7 +242,42 @@ class DataFrameOperationsComponent(Component):
raise ValueError(msg)
def filter_rows_by_value(self, df: DataFrame) -> DataFrame:
return DataFrame(df[df[self.column_name] == self.filter_value])
column = df[self.column_name]
filter_value = self.filter_value
# Handle regular DropdownInput format (just a string value)
operator = getattr(self, "filter_operator", "equals") # Default to equals for backward compatibility
if operator == "equals":
mask = column == filter_value
elif operator == "not equals":
mask = column != filter_value
elif operator == "contains":
mask = column.astype(str).str.contains(str(filter_value), na=False)
elif operator == "starts with":
mask = column.astype(str).str.startswith(str(filter_value), na=False)
elif operator == "ends with":
mask = column.astype(str).str.endswith(str(filter_value), na=False)
elif operator == "greater than":
try:
# Try to convert filter_value to numeric for comparison
numeric_value = pd.to_numeric(filter_value)
mask = column > numeric_value
except (ValueError, TypeError):
# If conversion fails, compare as strings
mask = column.astype(str) > str(filter_value)
elif operator == "less than":
try:
# Try to convert filter_value to numeric for comparison
numeric_value = pd.to_numeric(filter_value)
mask = column < numeric_value
except (ValueError, TypeError):
# If conversion fails, compare as strings
mask = column.astype(str) < str(filter_value)
else:
mask = column == filter_value # Fallback to equals
return DataFrame(df[mask])
def sort_by_column(self, df: DataFrame) -> DataFrame:
return DataFrame(df.sort_values(by=self.column_name, ascending=self.ascending))

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@ -1,84 +1,426 @@
import pandas as pd
import pytest
from langflow.components.processing.dataframe_operations import DataFrameOperationsComponent
from langflow.schema.dataframe import DataFrame
@pytest.fixture
def sample_dataframe():
data = {"A": [1, 2, 3, 4, 5], "B": [5, 4, 3, 2, 1], "C": ["a", "b", "c", "d", "e"]}
return pd.DataFrame(data)
"""Create a comprehensive sample DataFrame for testing."""
data = {
"name": ["John Doe", "Jane Smith", "Bob Johnson", "Alice Brown", "Charlie Wilson"],
"email": ["john@gmail.com", "jane@yahoo.com", "bob@gmail.com", "alice@hotmail.com", "charlie@outlook.com"],
"age": [25, 30, 35, 28, 42],
"salary": [50000, 60000, 70000, 55000, 80000],
"department": ["IT", "HR", "Finance", "IT", "Marketing"],
}
return DataFrame(pd.DataFrame(data))
@pytest.mark.parametrize(
("operation", "expected_columns", "expected_values"),
[
("Add Column", ["A", "B", "C", "D"], [1, 5, "a", 10]),
("Drop Column", ["A", "C"], None),
("Filter", ["A", "B", "C"], [3, 3, "c"]),
("Sort", ["A", "B", "C"], [5, 1, "e"]),
("Rename Column", ["Z", "B", "C"], None),
("Select Columns", ["A", "C"], None),
("Head", ["A", "B", "C"], [1, 5, "a"]),
("Tail", ["A", "B", "C"], [5, 1, "e"]),
("Replace Value", ["A", "B", "C"], [1, 5, "z"]),
],
)
def test_operations(sample_dataframe, operation, expected_columns, expected_values):
component = DataFrameOperationsComponent()
component.df = sample_dataframe
component.operation = operation
@pytest.fixture
def component():
"""Create a DataFrameOperationsComponent instance."""
return DataFrameOperationsComponent()
if operation == "Add Column":
component.new_column_name = "D"
component.new_column_value = 10
elif operation == "Drop Column":
component.column_name = "B"
elif operation == "Filter":
component.column_name = "A"
component.filter_value = 3
elif operation == "Sort":
component.column_name = "A"
class TestBasicOperations:
"""Test basic DataFrame operations with new SortableListInput format."""
def test_add_column(self, component, sample_dataframe):
"""Test adding a new column to the DataFrame."""
component.df = sample_dataframe
component.operation = [{"name": "Add Column", "icon": "plus"}]
component.new_column_name = "bonus"
component.new_column_value = 5000
result = component.perform_operation()
assert "bonus" in result.columns
assert len(result.columns) == 6 # Original 5 + 1 new
assert all(result["bonus"] == 5000) # All values should be 5000
def test_drop_column(self, component, sample_dataframe):
"""Test dropping a column from the DataFrame."""
component.df = sample_dataframe
component.operation = [{"name": "Drop Column", "icon": "minus"}]
component.column_name = "salary"
result = component.perform_operation()
assert "salary" not in result.columns
assert len(result.columns) == 4 # Original 5 - 1 dropped
def test_sort_ascending(self, component, sample_dataframe):
"""Test sorting DataFrame in ascending order."""
component.df = sample_dataframe
component.operation = [{"name": "Sort", "icon": "arrow-up-down"}]
component.column_name = "age"
component.ascending = True
result = component.perform_operation()
ages = result["age"].tolist()
assert ages == sorted(ages) # Should be sorted ascending
assert ages[0] == 25 # Youngest first
def test_sort_descending(self, component, sample_dataframe):
"""Test sorting DataFrame in descending order."""
component.df = sample_dataframe
component.operation = [{"name": "Sort", "icon": "arrow-up-down"}]
component.column_name = "salary"
component.ascending = False
elif operation == "Rename Column":
component.column_name = "A"
component.new_column_name = "Z"
elif operation == "Select Columns":
component.columns_to_select = ["A", "C"]
elif operation in {"Head", "Tail"}:
component.num_rows = 1
elif operation == "Replace Value":
component.column_name = "C"
component.replace_value = "a"
component.replacement_value = "z"
result = component.perform_operation()
result = component.perform_operation()
assert list(result.columns) == expected_columns
if expected_values is not None and isinstance(expected_values, list):
assert list(result.iloc[0]) == expected_values
salaries = result["salary"].tolist()
assert salaries == sorted(salaries, reverse=True) # Should be sorted descending
assert salaries[0] == 80000 # Highest first
def test_head_operation(self, component, sample_dataframe):
"""Test getting first N rows."""
component.df = sample_dataframe
component.operation = [{"name": "Head", "icon": "arrow-up"}]
component.num_rows = 2
result = component.perform_operation()
assert len(result) == 2
assert result.iloc[0]["name"] == "John Doe" # First row
def test_tail_operation(self, component, sample_dataframe):
"""Test getting last N rows."""
component.df = sample_dataframe
component.operation = [{"name": "Tail", "icon": "arrow-down"}]
component.num_rows = 2
result = component.perform_operation()
assert len(result) == 2
assert result.iloc[-1]["name"] == "Charlie Wilson" # Last row
def test_rename_column(self, component, sample_dataframe):
"""Test renaming a column."""
component.df = sample_dataframe
component.operation = [{"name": "Rename Column", "icon": "pencil"}]
component.column_name = "name"
component.new_column_name = "full_name"
result = component.perform_operation()
assert "full_name" in result.columns
assert "name" not in result.columns
assert result.iloc[0]["full_name"] == "John Doe"
def test_empty_dataframe():
class TestFilterOperations:
"""Test all filter operations with different operators."""
def test_filter_equals(self, component, sample_dataframe):
"""Test exact match filtering."""
component.df = sample_dataframe
component.operation = [{"name": "Filter", "icon": "filter"}]
component.column_name = "department"
component.filter_operator = "equals"
component.filter_value = "IT"
result = component.perform_operation()
assert len(result) == 2 # John and Alice work in IT
assert all(result["department"] == "IT")
def test_filter_not_equals(self, component, sample_dataframe):
"""Test exclusion filtering."""
component.df = sample_dataframe
component.operation = [{"name": "Filter", "icon": "filter"}]
component.column_name = "department"
component.filter_operator = "not equals"
component.filter_value = "IT"
result = component.perform_operation()
assert len(result) == 3 # Jane, Bob, Charlie not in IT
assert all(result["department"] != "IT")
def test_filter_contains(self, component, sample_dataframe):
"""Test partial string matching - THE MAIN FEATURE WE ADDED!"""
component.df = sample_dataframe
component.operation = [{"name": "Filter", "icon": "filter"}]
component.column_name = "email"
component.filter_operator = "contains"
component.filter_value = "gmail"
result = component.perform_operation()
assert len(result) == 2 # John and Bob have gmail
assert all("gmail" in email for email in result["email"])
def test_filter_starts_with(self, component, sample_dataframe):
"""Test prefix matching."""
component.df = sample_dataframe
component.operation = [{"name": "Filter", "icon": "filter"}]
component.column_name = "name"
component.filter_operator = "starts with"
component.filter_value = "J"
result = component.perform_operation()
assert len(result) == 2 # John and Jane start with J
assert all(name.startswith("J") for name in result["name"])
def test_filter_ends_with(self, component, sample_dataframe):
"""Test suffix matching."""
component.df = sample_dataframe
component.operation = [{"name": "Filter", "icon": "filter"}]
component.column_name = "email"
component.filter_operator = "ends with"
component.filter_value = ".com"
result = component.perform_operation()
assert len(result) == 5 # All emails end with .com
assert all(email.endswith(".com") for email in result["email"])
def test_filter_greater_than(self, component, sample_dataframe):
"""Test numeric greater than comparison."""
component.df = sample_dataframe
component.operation = [{"name": "Filter", "icon": "filter"}]
component.column_name = "age"
component.filter_operator = "greater than"
component.filter_value = "30"
result = component.perform_operation()
assert len(result) == 2 # Bob(35) and Charlie(42)
assert all(age > 30 for age in result["age"])
def test_filter_less_than(self, component, sample_dataframe):
"""Test numeric less than comparison."""
component.df = sample_dataframe
component.operation = [{"name": "Filter", "icon": "filter"}]
component.column_name = "salary"
component.filter_operator = "less than"
component.filter_value = "60000"
result = component.perform_operation()
assert len(result) == 2 # John(50k) and Alice(55k)
assert all(salary < 60000 for salary in result["salary"])
class TestEdgeCases:
"""Test edge cases and error conditions."""
def test_empty_selection(self, component, sample_dataframe):
"""Test when no operation is selected (deselection)."""
component.df = sample_dataframe
component.operation = [] # Empty selection
result = component.perform_operation()
# Should return original DataFrame unchanged
assert len(result) == len(sample_dataframe)
assert list(result.columns) == list(sample_dataframe.columns)
def test_invalid_operation_format(self, component, sample_dataframe):
"""Test with invalid operation format."""
component.df = sample_dataframe
component.operation = "Invalid String" # Not list format
result = component.perform_operation()
# Should return original DataFrame
assert len(result) == len(sample_dataframe)
def test_empty_dataframe(self, component):
"""Test operations on empty DataFrame."""
component.df = DataFrame(pd.DataFrame())
component.operation = [{"name": "Head", "icon": "arrow-up"}]
component.num_rows = 3
result = component.perform_operation()
assert result.empty
def test_non_existent_column(self, component, sample_dataframe):
"""Test operation on non-existent column."""
component.df = sample_dataframe
component.operation = [{"name": "Drop Column", "icon": "minus"}]
component.column_name = "non_existent_column"
with pytest.raises(KeyError):
component.perform_operation()
def test_filter_no_matches(self, component, sample_dataframe):
"""Test filter that returns no matches."""
component.df = sample_dataframe
component.operation = [{"name": "Filter", "icon": "filter"}]
component.column_name = "department"
component.filter_operator = "equals"
component.filter_value = "NonExistentDepartment"
result = component.perform_operation()
assert len(result) == 0 # No matches
assert list(result.columns) == list(sample_dataframe.columns) # Columns preserved
class TestDynamicUI:
"""Test dynamic UI behavior with update_build_config."""
def test_filter_fields_show(self, component):
"""Test that filter fields show when Filter is selected."""
build_config = {
"column_name": {"show": False},
"filter_value": {"show": False},
"filter_operator": {"show": False},
"ascending": {"show": False},
"new_column_name": {"show": False},
"new_column_value": {"show": False},
"columns_to_select": {"show": False},
"num_rows": {"show": False},
"replace_value": {"show": False},
"replacement_value": {"show": False},
}
# Select Filter operation
updated_config = component.update_build_config(
build_config, [{"name": "Filter", "icon": "filter"}], "operation"
)
assert updated_config["column_name"]["show"] is True
assert updated_config["filter_value"]["show"] is True
assert updated_config["filter_operator"]["show"] is True
assert updated_config["ascending"]["show"] is False # Not for filter
def test_sort_fields_show(self, component):
"""Test that sort fields show when Sort is selected."""
build_config = {
"column_name": {"show": False},
"filter_value": {"show": False},
"filter_operator": {"show": False},
"ascending": {"show": False},
"new_column_name": {"show": False},
"new_column_value": {"show": False},
"columns_to_select": {"show": False},
"num_rows": {"show": False},
"replace_value": {"show": False},
"replacement_value": {"show": False},
}
# Select Sort operation
updated_config = component.update_build_config(
build_config, [{"name": "Sort", "icon": "arrow-up-down"}], "operation"
)
assert updated_config["column_name"]["show"] is True
assert updated_config["ascending"]["show"] is True
assert updated_config["filter_value"]["show"] is False # Not for sort
assert updated_config["filter_operator"]["show"] is False # Not for sort
def test_empty_selection_hides_fields(self, component):
"""Test that all fields hide when operation is deselected."""
build_config = {
"column_name": {"show": True},
"filter_value": {"show": True},
"filter_operator": {"show": True},
"ascending": {"show": True},
"new_column_name": {"show": True},
"new_column_value": {"show": True},
"columns_to_select": {"show": True},
"num_rows": {"show": True},
"replace_value": {"show": True},
"replacement_value": {"show": True},
}
# Deselect operation (empty list)
updated_config = component.update_build_config(
build_config,
[], # Empty selection
"operation",
)
# All fields should be hidden
assert updated_config["column_name"]["show"] is False
assert updated_config["filter_value"]["show"] is False
assert updated_config["filter_operator"]["show"] is False
assert updated_config["ascending"]["show"] is False
assert updated_config["new_column_name"]["show"] is False
assert updated_config["new_column_value"]["show"] is False
assert updated_config["columns_to_select"]["show"] is False
assert updated_config["num_rows"]["show"] is False
assert updated_config["replace_value"]["show"] is False
assert updated_config["replacement_value"]["show"] is False
class TestDataTypes:
"""Test different data types and conversions."""
def test_numeric_string_conversion(self, component):
"""Test that string numbers are properly converted for comparison."""
data = pd.DataFrame({"values": [10, 20, 30, 40, 50], "names": ["a", "b", "c", "d", "e"]})
component.df = DataFrame(data)
component.operation = [{"name": "Filter", "icon": "filter"}]
component.column_name = "values"
component.filter_operator = "greater than"
component.filter_value = "25" # String input
result = component.perform_operation()
assert len(result) == 3 # 30, 40, 50 are > 25
assert all(val > 25 for val in result["values"])
def test_mixed_data_types(self, component):
"""Test filtering on mixed data types."""
data = pd.DataFrame({"mixed": ["text", 123, "more_text", 456], "id": [1, 2, 3, 4]})
component.df = DataFrame(data)
component.operation = [{"name": "Filter", "icon": "filter"}]
component.column_name = "mixed"
component.filter_operator = "contains"
component.filter_value = "text"
result = component.perform_operation()
assert len(result) == 2 # "text" and "more_text"
# Integration test to verify all operators work together
def test_all_filter_operators_comprehensive():
"""Comprehensive test of all filter operators on the same dataset."""
data = pd.DataFrame(
{
"name": ["John", "Jane", "Bob", "Alice"],
"email": ["john@gmail.com", "jane@yahoo.com", "bob@gmail.com", "alice@test.org"],
"age": [25, 30, 35, 28],
"score": [85.5, 92.0, 78.5, 88.0],
}
)
component = DataFrameOperationsComponent()
component.df = pd.DataFrame()
component.operation = "Head"
component.num_rows = 3
result = component.perform_operation()
assert result.empty
component.df = DataFrame(data)
component.operation = [{"name": "Filter", "icon": "filter"}]
# Test all operators
test_cases = [
("email", "contains", "gmail", 2), # John, Bob
("name", "starts with", "J", 2), # John, Jane
("email", "ends with", ".com", 3), # All except Alice
("age", "greater than", "28", 2), # Jane, Bob
("score", "less than", "90", 3), # John, Bob, Alice
("name", "equals", "John", 1), # Only John
("email", "not equals", "jane@yahoo.com", 3), # All except Jane
]
for column, operator, value, expected_count in test_cases:
component.column_name = column
component.filter_operator = operator
component.filter_value = value
result = component.perform_operation()
assert len(result) == expected_count, f"Failed for {operator} on {column} with value {value}"
def test_non_existent_column():
component = DataFrameOperationsComponent()
component.df = pd.DataFrame({"A": [1, 2, 3]})
component.operation = "Drop Column"
component.column_name = "B"
with pytest.raises(KeyError):
component.perform_operation()
def test_invalid_operation():
component = DataFrameOperationsComponent()
component.df = pd.DataFrame({"A": [1, 2, 3]})
component.operation = "Invalid Operation"
with pytest.raises(ValueError, match="Unsupported operation: Invalid Operation"):
component.perform_operation()
if __name__ == "__main__":
pytest.main([__file__])