??? ?? ??? ??? ??? ??? ?? ?? ??? ????. ? ??? ???? ???? ????, ?? ???? ?? ???? ????, ??? ??, ??? ????? ?? ??? ???? ?? ???? ? ??? ? ????. ? ??? ???? ?? ???? ???? ?? ??? ???? ?????? ??? ??? ??? ???? ?? ??? ? ????. ???? ??? ???? ?? ? ??? ?? ?? ?? ? ? ?????. ??? ??? ?? ?? ??? ??? ???? ?? ??? ?????.

greeting = "Hello, World!"

? :

<<>

? ??? ?? ???? ?????.

>>> word = 'golden'
>>> len(word)
6
>>> word + 'age'
'goldenage'
>>> 'la' * 3
'lalala'
>>>

? :

<,> ????? ??? ?? ? ???? UTF-8?? ????? ??? ???? ??? ?????. ??? ?? ??? ? ?? ??? ???? ??? ?????. ?? ??? ? ?? ?? ?? ??? ????.

greeting = "Hello, World!"

>>> word = 'golden'
>>> len(word)
6
>>> word + 'age'
'goldenage'
>>> 'la' * 3
'lalala'
>>>

>>> "i Enjoy traveling. Do you?".capitalize()
'I enjoy traveling. do you?'
>>>

>>> sentence = 'i Enjoy traveling. Do you?'
>>> len(sentence)
26
>>> sentence.center(31)
'  i Enjoy traveling. Do you? '
>>> sentence.center(30)
' i Enjoy traveling. Do you? '

>>> sentence = "i Enjoy traveling. Do you, 山本さん?"
>>> sentence.encode()
b'i Enjoy traveling. Do you, \xe5\xb1\xb1\xe6\x9c\xac\xe3\x81\x95\xe3\x82\x93?'
>>> sentence.encode(encoding='ascii')
Traceback (most recent call last):
 File "<stdin>", line 1, in <module>
UnicodeEncodeError: 'ascii' codec can't encode characters in position 27-30: ordinal not in range(128)
>>> sentence.encode(encoding='ascii', errors='replace')
b'i Enjoy traveling. Do you, ?????'

>>> 'i Enjoy traveling. Do you?'.lower()
'i enjoy traveling. do you?'
>>>

>>> 'i Enjoy traveling. Do you?'.removeprefix('i')
' Enjoy traveling. Do you?'
>>>

>>> 'i Enjoy traveling. Do you?'.removesuffix('Do you?')
'i Enjoy traveling. '
>>>

? :

• <<> : ????? ???? ?? ??? str.join(iterable)? ???? ??? ??? ?????. ??? ?? ??? ?? -1? ??????. TypeError ? :

  >>> 'i Enjoy traveling. Do you?'.replace('Enjoy','dislike')
  'i dislike traveling. Do you?'
  >>> 'Things fall apart'.replace('a','e',1)
  'Things fell apart'
  >>>

  <<>
• : ????? ???? ?? ???

  ? ???? ??? ??? ?????. ?? ???? ?? ? ??? ??? ?????. str.split(sep=None, maxsplit=-1) ? :

  ?? ?? ???? ??

  >>> word1 = ' whitespace '.strip()
  >>> word1
  'whitespace'
  >>> word2 = 'exercise'.strip('e')
  >>> word2
  'xercis'
  >>> word3 = 'chimpanze'.strip('acepnz')
  >>> word3
  'him'
  >>>

  <<

• <<> str.endswith(suffix[, start[, end]]) : ? ??? suffix? ??? True? ?????. False

  ? :

  greeting = "Hello, World!"

<<>

• : ???? ???? ???? ?? ??? ??? ????? ?? . str.isalnum() ? : True False

  <<>

  >>> word = 'golden'
  >>> len(word)
  6
  >>> word + 'age'
  'goldenage'
  >>> 'la' * 3
  'lalala'
  >>>

  : ???? ?? ??? ???? ??? ??? ??? ???
? ?????.

• ? : str.isalpha() True <<> False

  : ???? ?? ??? ASCII ????? ???? ?? ???

  ? ?????.

  >>> "i Enjoy traveling. Do you?".capitalize()
  'I enjoy traveling. do you?'
  >>>

  ? :

• <<> str.isascii() : ???? ?? ?? ??? ???? ?? ??? ??? ????? ?? True. False

  ? :

  >>> sentence = 'i Enjoy traveling. Do you?'
  >>> len(sentence)
  26
  >>> sentence.center(31)
  '  i Enjoy traveling. Do you? '
  >>> sentence.center(30)
  ' i Enjoy traveling. Do you? '

<<>

• : ???? ?? ??? ???? ?? ??? ??? ????? ?? ? ?????. str.isdecimal() ? : True False

  <<>

  >>> sentence = "i Enjoy traveling. Do you, 山本さん?"
  >>> sentence.encode()
  b'i Enjoy traveling. Do you, \xe5\xb1\xb1\xe6\x9c\xac\xe3\x81\x95\xe3\x82\x93?'
  >>> sentence.encode(encoding='ascii')
  Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
  UnicodeEncodeError: 'ascii' codec can't encode characters in position 27-30: ordinal not in range(128)
  >>> sentence.encode(encoding='ascii', errors='replace')
  b'i Enjoy traveling. Do you, ?????'

  : ???? ?? ??? ????? ??? ??? ??? ???
? ?????.

• ? : str.isnumeric() True <<> False

  : ???? ?? ??? ????? ??? ??? ??? ???

  ? ?????.

  >>> "I bought {0} apples and the cost {1:.2f} Ghana cedis.".format(2, 18.70)
  'I bought 2 apples and the cost 18.70 Ghana cedis.'
  >>> "My name is {first_name}, and I'm a {profession}.".format(first_name='Ben', profession='doctor')
  "My name is Ben, and I'm a doctor."
  >>>

  ? :

• <<> str.islower() : RETCH True? ??? False? ???? ? ?????.

  ? :

  >>> 'i Enjoy traveling. Do you?'.lower()
  'i enjoy traveling. do you?'
  >>>

• ??? ??? (bytes.decode ())

  str.isupper() True <<> False

  : ???? ???? ??????.

  <,> ????? ???? 'UTF-8'?? ??? ????

  ??? ?????.

  >>> 'i Enjoy traveling. Do you?'.removeprefix('i')
  ' Enjoy traveling. Do you?'
  >>>

  , ?
? ?? ?? ??? ???? ?? ??? ?? ?????.

• ? : str.startswith(prefix[, start[, end]]) <<> ?? prefix True

  Python ??? ??? ???? ??? ???? ???? ??? ??????. Python? ??? ??? ?? ???? ????? ???? ????? ??? ??? ?????. False

  <<> ??
  ?? ??? ??? ????????.

  >>> 'i Enjoy traveling. Do you?'.removesuffix('Do you?')
  'i Enjoy traveling. '
  >>>

  ??? ?? ? ???? ??? ???? ?? ??? ? ????. <p> (FAQ ??? ?? ?? ?? ?? ??? ???? ?? ??? ?????. FAQS ??? ??? ?? ?? ?? ?? ? ? ????.) <strong>.</strong></p>

  ? ??? Python ??? ??, ??? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!