Python strings

• Exact match (equality comparison): ==, !=
• Partial match: in, not in
• Forward/backward match: startswith(), endswith()
• Order comparison: <, ⇐, >, >=
• Case-insensitive comparison: upper(), lower()
• Regex: re.search(), re.fullmatch()

/via: https://note.nkmk.me/en/python-str-compare/

• string formatinghttps://realpython.com/python-string-formatting/
  • «string%s»%(param1)
  • «string {} {}».format(1parm,2param)
  • «string {1}{2}{1}».format(1param,2param)
  • interpolación (f-string): f«string {name} {a + b}»
  • Template strings

• To create an f-string, prefix the string with the letter “ f ”. The string itself can be formatted in much the same way that you would with str.format(). F-strings provide a concise and convenient way to embed python expressions inside string literals for formatting.
• F-strings are faster than the two most commonly used string formatting mechanisms, which are % formatting and str.format().

val = 'Geeks'
print(f"{val}for{val} is a portal for {val}.")

import datetime
 
today = datetime.datetime.today()
print(f"{today:%B %d, %Y}")

Backslash Cannot be used in format string directly.

error

f"newline: {ord('\n')}"

correcto

newline = ord('\n')
 
print(f"newline: {newline}")

/+info: https://www.python.org/dev/peps/pep-0498/ /via: https://www.geeksforgeeks.org/formatted-string-literals-f-strings-python/

• ljust(), rjust(), center()
• %15s, %15-s
• {:15}, {:>15}

/via:https://www.delftstack.com/es/howto/python/python-pad-string-with-spaces/

• zfill()

• n=42
• print(f'{n:05d}')
• print('%05d' % n)
• print('{0:05d}'.format(n))
• 00042

/via: https://www.python-engineer.com/posts/pad-zeros-string/

• s1+s2
• «%s %s»%(s1,s2)
• «-».join([s1,s2])
• «{}{}».format(s1,s2)

/via: https://www.tutorialspoint.com/how-to-concatenate-two-strings-in-python