Comparing columns with pandas_schema - python-3.x

Question

I am using python 3.8 and Pandas_schema to run integrity checks on data. I have a requirement that workflow_next_step should never be the same as workflow_entry_step. I'm trying to generate a CustomSeriesValidation that compares both columns because I do not see a stock function that does this.
Is there a way to compare two cell values in the same row using Pandas_Schema? In this example, Pandas_Schema would return an error for Mary because she was moved from In Progress to In Progress.
df = config.pd.DataFrame({
'prospect': ['Bob', 'Jill', 'Steve', 'Mary'],
'value': [10000, 15000, 500, 50000],
'workflow_entry_step': ['New', 'In Progress', 'Closed', 'In Progress'],
'workflow_next_step': ['In Progress', 'Closed' ,None, 'In Progress']})
schema = Schema([
Column('prospect', [LeadingWhitespaceValidation(), TrailingWhitespaceValidation()]),
Column('value', [CanConvertValidation(int),'Doesn\'t convert to integer.']),
Column('workflow_entry_step', [InListValidation([None,'New','In Progress','Closed'])]),
Column('workflow_next_step', [CustomSeriesValidation(lambda x: x != Column('workflow_entry_step'), InListValidation([None,'New','In Progress','Closed'])]), 'Steps cannot be the same.')])

Answer 1

import pandas as pd
df = pd.DataFrame({
'prospect': ['Bob', 'Jill', 'Steve', 'Mary'],
'value': [10000, 15000, 500, 50000],
'workflow_entry_step': ['New', 'In Progress', 'Closed', 'In Progress'],
'workflow_next_step': ['In Progress', 'Closed' ,None, 'In Progress']})
schema = Schema([
Column('prospect', [LeadingWhitespaceValidation(), TrailingWhitespaceValidation()]),
Column('value', [CanConvertValidation(float)]),
Column('workflow_entry_step', [InListValidation([None,'New','In
Progress','Closed'])]),
Column('workflow_next_step', [CustomSeriesValidation(lambda x: x !=
df['workflow_entry_step'], 'Steps cannot be the same.'),
InListValidation([None,'New','In Progress','Closed'])])
])
errors = schema.validate(df)
for error in errors:
print(error)
Output:
{row: 3, column: "workflow_next_step"}: "In Progress" Steps cannot be the same.