This situation may simply indicate poor naming. Method names should be action-oriented, and thus contain a verb, which is unlikely in the case where both a method and a field have the same name (with or without capitalization differences). However, renaming a public method could be disruptive to callers. Therefore renaming the member is the recommended action.
== Noncompliant Code Example
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class SomeClass:
lookUp = false
def lookup(): # Non-compliant; method name differs from field name only by capitalization