Python中字符串的常用方法总结

s = "   abcd   "
print("|"+s.strip()+"|")
print("|"+s.lstrip()+"|")
print("|"+s.rstrip()+"|")

s = "hello:world"
print(s.removeprefix("hello"))
print(s.removesuffix("world"))

s = "hello:world"
s = s.replace(":", "-")
print(s)

s = "hello:world:ok"
print(s.split(":"))
print(s.rsplit(":"))
print(s.split(":", maxsplit=1))
print(s.rsplit(":", maxsplit=1))

l = ["hello", "1", "world"]
print("".join(l))
print("-".join(l))

s = "helloWORLD"
print(s.upper())
print(s.lower())
print(s.capitalize())

s1 = "helloworld"
s2 = "OK"
s3 = "hello OK"
s4 = "567"
s5 = "hello123"

print(s1.islower())
print(s2.isupper())
print(s3.islower(), s3.isupper())
print(s1.isalpha())
print(s4.isnumeric())
print(s5.isalpha(), s5.isnumeric())
print(s5.isalnum())
print(s3.isalnum())

s = "hello world"
print(s.count("o"))

s = "hello world"
print(s.find("x"))
print(s.find("o"))
print(s.rfind("o"))

s = "hello world"
print(s.startswith("h"), s.endswith("h"))
print(s.startswith("d"), s.endswith("d"))

s = "hello world"
print(s.partition(" "))
print(s.partition("hello"))
print(s.partition("123"))

s = "python"
print(s.center(30))
print(s.center(30, "-"))
print(s.ljust(30, "-"))
print(s.rjust(30, "-"))

name = "bk"
age = 15
print(f"my name is {name},and i am {age} years old!")

name = "My Name is Mr.white"
print(name.swapcase())

print("100".zfill(5))
print("+100".zfill(5))
print("-100".zfill(5))
print("+0010".zfill(5))