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fixed "Shadows name 'var' from outer scope."
fixed "Variable in function should be lowercase "
fixed "Shadows built-in name 'iter' " in iter variables
fixed other edit styles like:
PEP 8: E261 at least two spaces before inline comment
"PEP 8: E302 expected 2 blank lines, found 1"
"PEP 8: E201 whitespace after '{'"
"PEP 8: E231 missing whitespace after ','"
"Variable in function should be lowercase"