isalpha & isalnum in Python

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*Memo:

• My post explains string, bytes and bytearray functions.

str.isalpha() and bytes.isalpha() or bytearray.isalpha() can check if the string and bytes or bytearray respectively only have one or more alphabetic characters and bytes and aren't empty as shown below:

*Memo:

• Each has no arguments.

<String>:

print('JohnSmith'.isalpha())
# True

print('John Smith'.isalpha())
print('Python3'.isalpha())
print(''.isalpha())
# False

<Bytes & Bytearray>:

print(b'JohnSmith'.isalpha())
print(bytearray(b'JohnSmith').isalpha())
# True

print(b'John Smith'.isalpha())
print(bytearray(b'John Smith').isalpha())
print(b'Python3'.isalpha())
print(bytearray(b'Python3').isalpha())
print(b''.isalpha())
print(bytearray(b'').isalpha())
# False

str.isalnum() and bytes.isalnum() or bytearray.isalnum() can check if the string and bytes or bytearray respectively only have one or more alphanumeric(alphabetic and/or numeric) characters and ASCII alphabetic and/or decimal digital bytes and aren't empty as shown below:

*Memo:

• Each has no arguments.
• str.isalnum() is like the combination of str.isalpha() and str.isnumeric().
• bytes.isalnum() is like the combination of bytes.isalpha() and bytes.isdigit().
• bytearray.isalnum() is like the combination of bytearray.isalpha() and bytearray.isdigit().

<String>:

print('Python3'.isalnum())
# True

print('Python 3'.isalnum())
print(''.isalnum())
# False

print('12345'.isalnum())     # Lowercase Arabic Numeral
print('１２３４５'.isalnum()) # Uppercase Arabic Numeral
print('١٢٣٤٥'.isalnum())     # 12345 (Eastern Arabic Numeral)
print('¹²³⁴⁵'.isalnum())     # 12345 (Superscript Arabic Numeral)
print('₁₂₃₄₅'.isalnum())     # 12345 (Subscript Arabic Numeral)
print('ⅻ'.isalnum())        # 12 (Lowercase Roman Numeral)
print('Ⅻ'.isalnum())       # 12 (Uppercase Roman Numeral)
print('xii'.isalnum())       # 12 (Lowercase Alphabet)
print('XII'.isalnum())       # 12 (Uppercase Alphabet)
print('十二'.isalnum())      # 12 (Japanese Kanji Numeral)
print('壱弐'.isalnum())      # 12 (Japanese Kanji Numeral)
print('0b1100'.isalnum())    # 12 (Binary)
print('0o14'.isalnum())      # 12 (Octal)
print('0xc'.isalnum())       # 12 (Hexadecimal)
# True

print('-12345'.isalnum())
print('1 2 3 4 5'.isalnum()) # With spaces
print('1.2345'.isalnum())
print('1,2345'.isalnum())
print('1.23+4.5j'.isalnum())
print(''.isalnum())
# False

# Extra
print('①②③④⑤'.isalnum())
print('⓵⓶⓷⓸⓹'.isalnum())
print('❶❷❸❹❺'.isalnum())
print('➊➋➌➍➎'.isalnum())
print('⑴⑵⑶⑷⑸'.isalnum())
print('⒈⒉⒊⒋⒌'.isalnum())
# True

print('1⃣2⃣3⃣4⃣5⃣'.isalnum())
# False

<Bytes & Bytearray>:

bytes:

print(b'Python3'.isalnum())
# True

print(b'Python 3'.isalnum())
print(b''.isalnum())
# False

print('12345'.encode().isalnum())     # Lowercase Arabic Numeral
print('xii'.encode().isalnum())       # 12 (Lowercase Alphabet)
print('XII'.encode().isalnum())       # 12 (Uppercase Alphabet)
print('0b1100'.encode().isalnum())    # 12 (Binary)
print('0o14'.encode().isalnum())      # 12 (Octal)
print('0xc'.encode().isalnum())       # 12 (Hexadecimal)
# True

print('１２３４５'.encode().isalnum()) # Uppercase Arabic Numeral
print('١٢٣٤٥'.encode().isalnum())     # 12345 (Eastern Arabic Numeral)
print('¹²³⁴⁵'.encode().isalnum())     # 12345 (Superscript Arabic Numeral)
print('₁₂₃₄₅'.encode().isalnum())     # 12345 (Subscript Arabic Numeral)
print('ⅻ'.encode().isalnum())        # 12 (Lowercase Roman Numeral)
print('Ⅻ'.encode().isalnum())       # 12 (Uppercase Roman Numeral)
print('十二'.encode().isalnum())      # 12 (Japanese Kanji Numeral)
print('壱弐'.encode().isalnum())      # 12 (Japanese Kanji Numeral)
print('-12345'.encode().isalnum())
print('1 2 3 4 5'.encode().isalnum()) # With spaces
print('1.2345'.encode().isalnum())
print('1,2345'.encode().isalnum())
print('1.23+4.5j'.encode().isalnum())
print(''.encode().isalnum())
# False

# Extra
print('①②③④⑤'.encode().isalnum())
print('⓵⓶⓷⓸⓹'.encode().isalnum())
print('❶❷❸❹❺'.encode().isalnum())
print('➊➋➌➍➎'.encode().isalnum())
print('⑴⑵⑶⑷⑸'.encode().isalnum())
print('⒈⒉⒊⒋⒌'.encode().isalnum())
print('1⃣2⃣3⃣4⃣5⃣'.encode().isalnum())
# False

bytearray:

print(bytearray(b'Python3').isalnum())
# True

print(bytearray(b'Python 3').isalnum())
print(bytearray(b'').isalnum())
# False

ba = bytearray

print(ba('12345'.encode()).isalnum())     # Lowercase Arabic Numeral
print(ba('xii'.encode()).isalnum())       # 12 (Lowercase Alphabet)
print(ba('XII'.encode()).isalnum())       # 12 (Uppercase Alphabet)
print(ba('0b1100'.encode()).isalnum())    # 12 (Binary)
print(ba('0o14'.encode()).isalnum())      # 12 (Octal)
print(ba('0xc'.encode()).isalnum())       # 12 (Hexadecimal)
# True

print(ba('１２３４５'.encode()).isalnum()) # Uppercase Arabic Numeral
print(ba('١٢٣٤٥'.encode()).isalnum())     # 12345 (Eastern Arabic Numeral)
print(ba('¹²³⁴⁵'.encode()).isalnum())     # 12345 (Superscript Arabic Numeral)
print(ba('₁₂₃₄₅'.encode()).isalnum())     # 12345 (Subscript Arabic Numeral)
print(ba('ⅻ'.encode()).isalnum())        # 12 (Lowercase Roman Numeral)
print(ba('Ⅻ'.encode()).isalnum())       # 12 (Uppercase Roman Numeral)
print(ba('十二'.encode()).isalnum())      # 12 (Japanese Kanji Numeral)
print(ba('壱弐'.encode()).isalnum())      # 12 (Japanese Kanji Numeral)
print(ba('-12345'.encode()).isalnum())
print(ba('1 2 3 4 5'.encode()).isalnum()) # With spaces
print(ba('1.2345'.encode()).isalnum())
print(ba('1,2345'.encode()).isalnum())
print(ba('1.23+4.5j'.encode()).isalnum())
print(ba(''.encode()).isalnum())
# False

# Extra
print(ba('①②③④⑤'.encode()).isalnum())
print(ba('⓵⓶⓷⓸⓹'.encode()).isalnum())
print(ba('❶❷❸❹❺'.encode()).isalnum())
print(ba('➊➋➌➍➎'.encode()).isalnum())
print(ba('⑴⑵⑶⑷⑸'.encode()).isalnum())
print(ba('⒈⒉⒊⒋⒌'.encode()).isalnum())
print(ba('1⃣2⃣3⃣4⃣5⃣'.encode()).isalnum())
# False