Question: How to validate a string in python that must contains numbers and characters. Also only contains one special character dot and one special character colon.

How to validate a string in python that must contains numbers and characters. Also only contains one special character dot and one special character colon. For example: MT:Y.K90ADB00KA0648G00 this is a valid string. It contains both numbers and characters and also contains only one colon and only one dot. MT:Y.K90ADB00KA0648G00= This is invalid, it contains another special character MT Y.K90ADB00KA0648G00 This is invalid, it doesn't have a colon and has white space MT:Y.KADBKA This is invalid, it doesn't contain numbers

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