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+ import re
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+
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+
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+ def is_sri_lankan_phone_number (phone : str ) -> bool :
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+ """
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+ Determine whether the string is a valid sri lankan mobile phone number or not
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+ References: https://aye.sh/blog/sri-lankan-phone-number-regex
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+
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+ >>> is_sri_lankan_phone_number("+94773283048")
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+ True
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+ >>> is_sri_lankan_phone_number("+9477-3283048")
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+ True
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+ >>> is_sri_lankan_phone_number("0718382399")
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+ True
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+ >>> is_sri_lankan_phone_number("0094702343221")
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+ True
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+ >>> is_sri_lankan_phone_number("075 3201568")
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+ True
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+ >>> is_sri_lankan_phone_number("07779209245")
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+ False
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+ >>> is_sri_lankan_phone_number("0957651234")
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+ False
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+ """
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+
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+ pattern = re .compile (
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+ r"^(?:0|94|\+94|0{2}94)" r"7(0|1|2|4|5|6|7|8)" r"(-| |)" r"\d{7}$"
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+ )
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+
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+ return bool (re .search (pattern , phone ))
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+
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+
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+ if __name__ == "__main__" :
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+ phone = "0094702343221"
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+
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+ print (is_sri_lankan_phone_number (phone ))
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