*Memo for string, bytes and bytearray functions:
- My post explains isalpha() and isalnum().
- My post explains isascii(), isspace(), isprintable() and isidentifier().
- My post explains iskeyword() and issoftkeyword().
- My post explains encode() and decode().
*Memo for a string, bytes and bytearray:
isdecimal() < isdigit() < isnumeric(). *True is returned for more numeric characters as going from the left to the right.
str.isdecimal() can check if the string only has decimal characters and isn't empty as shown below:
*Memo:
- It has no arguments.
-
bytes.isdecimal()andbytearray.isdecimal()don't exist for a bytes and bytearray respectively.
<String>:
print('12345'.isdecimal()) # Half-Width Arabic Numeral print('１２３４５'.isdecimal()) # Full-Width Arabic Numeral print('١٢٣٤٥'.isdecimal()) # 12345 (Eastern Arabic Numeral) # True print('¹²³⁴⁵'.isdecimal()) # 12345 (Superscript Arabic Numeral) print('₁₂₃₄₅'.isdecimal()) # 12345 (Subscript Arabic Numeral) print('ⅻ'.isdecimal()) # 12 (Half-Width Roman Numeral) print('Ⅻ'.isdecimal()) # 12 (Full-Width Roman Numeral) print('十二'.isdecimal()) # 12 (Japanese Kanji Numeral) print('壱弐'.isdecimal()) # 12 (Japanese Kanji Numeral) print('-12345'.isdecimal()) print('1 2 3 4 5'.isdecimal()) # With spaces print('1.2345'.isdecimal()) print('1,2345'.isdecimal()) print('1.23+4.5j'.isdecimal()) print('xii'.isdecimal()) # 12 (Half-Width Alphabet) print('XII'.isdecimal()) # 12 (Full-Width Alphabet) print('0b1100'.isdecimal()) # 12 (Binary) print('0o14'.isdecimal()) # 12 (Octal) print('0xc'.isdecimal()) # 12 (Hexadecimal) print(''.isdecimal()) # False # Extra print('①②③④⑤'.isdecimal()) print('⓵⓶⓷⓸⓹'.isdecimal()) print('❶❷❸❹❺'.isdecimal()) print('➊➋➌➍➎'.isdecimal()) print('⑴⑵⑶⑷⑸'.isdecimal()) print('⒈⒉⒊⒋⒌'.isdecimal()) print('1⃣2⃣3⃣4⃣5⃣'.isdecimal()) # False str.isdigit() and bytes.isdigit() or bytearray.isdigit() can check if the string and bytes or bytearray respectively only have digital characters and ASCII decimal digital bytes and aren't empty as shown below:
*Memos:
- Each has no arguments.
<String>:
print('12345'.isdigit()) # Half-Width Arabic Numeral print('１２３４５'.isdigit()) # Full-Width Arabic Numeral print('١٢٣٤٥'.isdigit()) # 12345 (Eastern Arabic Numeral) print('¹²³⁴⁵'.isdigit()) # 12345 (Superscript Arabic Numeral) print('₁₂₃₄₅'.isdigit()) # 12345 (Subscript Arabic Numeral) # True print('ⅻ'.isdigit()) # 12 (Half-Width Roman Numeral) print('Ⅻ'.isdigit()) # 12 (Full-Width Roman Numeral) print('十二'.isdigit()) # 12 (Japanese Kanji Numeral) print('壱弐'.isdigit()) # 12 (Japanese Kanji Numeral) print('-12345'.isdigit()) print('1 2 3 4 5'.isdigit()) # With spaces print('1.2345'.isdigit()) print('1,2345'.isdigit()) print('1.23+4.5j'.isdigit()) print('xii'.isdigit()) # 12 (Half-Width Alphabet) print('XII'.isdigit()) # 12 (Full-Width Alphabet) print('0b1100'.isdigit()) # 12 (Binary) print('0o14'.isdigit()) # 12 (Octal) print('0xc'.isdigit()) # 12 (Hexadecimal) print(''.isdigit()) # False # Extra print('①②③④⑤'.isdigit()) print('⓵⓶⓷⓸⓹'.isdigit()) print('❶❷❸❹❺'.isdigit()) print('➊➋➌➍➎'.isdigit()) print('⑴⑵⑶⑷⑸'.isdigit()) print('⒈⒉⒊⒋⒌'.isdigit()) # True print('1⃣2⃣3⃣4⃣5⃣'.isdigit()) # False <Bytes & Bytearray>:
bytes:
print('12345'.encode().isdigit()) # Half-Width Arabic Numeral # True print('１２３４５'.encode().isdigit()) # Full-Width Arabic Numeral print('١٢٣٤٥'.encode().isdigit()) # 12345 (Eastern Arabic Numeral) print('¹²³⁴⁵'.encode().isdigit()) # 12345 (Superscript Arabic Numeral) print('₁₂₃₄₅'.encode().isdigit()) # 12345 (Subscript Arabic Numeral) print('ⅻ'.encode().isdigit()) # 12 (Half-Width Roman Numeral) print('Ⅻ'.encode().isdigit()) # 12 (Full-Width Roman Numeral) print('十二'.encode().isdigit()) # 12 (Japanese Kanji Numeral) print('壱弐'.encode().isdigit()) # 12 (Japanese Kanji Numeral) print('-12345'.encode().isdigit()) print('1 2 3 4 5'.encode().isdigit()) # With spaces print('1.2345'.encode().isdigit()) print('1,2345'.encode().isdigit()) print('1.23+4.5j'.encode().isdigit()) print('xii'.encode().isdigit()) # 12 (Half-Width Alphabet) print('XII'.encode().isdigit()) # 12 (Full-Width Alphabet) print('0b1100'.encode().isdigit()) # 12 (Binary) print('0o14'.encode().isdigit()) # 12 (Octal) print('0xc'.encode().isdigit()) # 12 (Hexadecimal) print(''.encode().isdigit()) # False # Extra print('①②③④⑤'.encode().isdigit()) print('⓵⓶⓷⓸⓹'.encode().isdigit()) print('❶❷❸❹❺'.encode().isdigit()) print('➊➋➌➍➎'.encode().isdigit()) print('⑴⑵⑶⑷⑸'.encode().isdigit()) print('⒈⒉⒊⒋⒌'.encode().isdigit()) print('1⃣2⃣3⃣4⃣5⃣'.encode().isdigit()) # False bytearray:
ba = bytearray print(ba('12345'.encode()).isdigit()) # Half-Width Arabic Numeral # True print(ba('１２３４５'.encode()).isdigit()) # Full-Width Arabic Numeral print(ba('١٢٣٤٥'.encode()).isdigit()) # 12345 (Eastern Arabic Numeral) print(ba('¹²³⁴⁵'.encode()).isdigit()) # 12345 (Superscript Arabic Numeral) print(ba('₁₂₃₄₅'.encode()).isdigit()) # 12345 (Subscript Arabic Numeral) print(ba('ⅻ'.encode()).isdigit()) # 12 (Half-Width Roman Numeral) print(ba('Ⅻ'.encode()).isdigit()) # 12 (Full-Width Roman Numeral) print(ba('十二'.encode()).isdigit()) # 12 (Japanese Kanji Numeral) print(ba('壱弐'.encode()).isdigit()) # 12 (Japanese Kanji Numeral) print(ba('-12345'.encode()).isdigit()) print(ba('1 2 3 4 5'.encode()).isdigit()) # With spaces print(ba('1.2345'.encode()).isdigit()) print(ba('1,2345'.encode()).isdigit()) print(ba('1.23+4.5j'.encode()).isdigit()) print(ba('xii'.encode()).isdigit()) # 12 (Half-Width Alphabet) print(ba('XII'.encode()).isdigit()) # 12 (Full-Width Alphabet) print(ba('0b1100'.encode()).isdigit()) # 12 (Binary) print(ba('0o14'.encode()).isdigit()) # 12 (Octal) print(ba('0xc'.encode()).isdigit()) # 12 (Hexadecimal) print(ba(''.encode()).isdigit()) # False # Extra print(ba('①②③④⑤'.encode()).isdigit()) print(ba('⓵⓶⓷⓸⓹'.encode()).isdigit()) print(ba('❶❷❸❹❺'.encode()).isdigit()) print(ba('➊➋➌➍➎'.encode()).isdigit()) print(ba('⑴⑵⑶⑷⑸'.encode()).isdigit()) print(ba('⒈⒉⒊⒋⒌'.encode()).isdigit()) print(ba('1⃣2⃣3⃣4⃣5⃣'.encode()).isdigit()) # False str.isnumeric() can check if a string only has numeric characters and isn't empty as shown below:
*Memo:
- It has no arguments.
-
bytes.isdecimal()andbytearray.isdecimal()don't exist for a bytes and bytearray respectively.
<String>:
print('12345'.isnumeric()) # Half-Width Arabic Numeral print('１２３４５'.isnumeric()) # Full-Width Arabic Numeral print('١٢٣٤٥'.isnumeric()) # 12345 (Eastern Arabic Numeral) print('¹²³⁴⁵'.isnumeric()) # 12345 (Superscript Arabic Numeral) print('₁₂₃₄₅'.isnumeric()) # 12345 (Subscript Arabic Numeral) print('ⅻ'.isnumeric()) # 12 (Half-Width Roman Numeral) print('Ⅻ'.isnumeric()) # 12 (Full-Width Roman Numeral) print('十二'.isnumeric()) # 12 (Japanese Kanji Numeral) print('壱弐'.isnumeric()) # 12 (Japanese Kanji Numeral) # True print('-12345'.isnumeric()) print('1 2 3 4 5'.isnumeric()) # With spaces print('1.2345'.isnumeric()) print('1,2345'.isnumeric()) print('1.23+4.5j'.isnumeric()) print('xii'.isnumeric()) # 12 (Half-Width Alphabet) print('XII'.isnumeric()) # 12 (Full-Width Alphabet) print('0b1100'.isnumeric()) # 12 (Binary) print('0o14'.isnumeric()) # 12 (Octal) print('0xc'.isnumeric()) # 12 (Hexadecimal) print(''.isnumeric()) # False # Extra print('①②③④⑤'.isnumeric()) print('⓵⓶⓷⓸⓹'.isnumeric()) print('❶❷❸❹❺'.isnumeric()) print('➊➋➌➍➎'.isnumeric()) print('⑴⑵⑶⑷⑸'.isnumeric()) print('⒈⒉⒊⒋⒌'.isnumeric()) # True print('1⃣2⃣3⃣4⃣5⃣'.isnumeric()) # False 
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