python change commas into dots

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string_number = '123,456'

result = float(string_number.replace(',', '.')) # change commas into dots and parse to float

print(result) # 123.456
print(type(result)) # <class 'float'>

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string_number = '123,456,789'

result = string_number.replace(',', '.')

print(result)  # 123.456.789