标签：tran 存在 拼接 数据类型 slow 分割 sde com exit
str
#断句 expandtabs test = "用户名\t密码\t邮箱\n李飞\t123\tlifei@163.com\n李飞\t123\tlifei@163.com\n李飞\t123\tlifei@163.com\n李飞\t123\tlifei@163.com\n" v = test.expandtabs(20) print(v) print(test)
E:\project\venv\Scripts\python.exe E:/project/day1/s3.py 用户名 密码 邮箱 李飞 123 lifei@163.com 李飞 123 lifei@163.com 李飞 123 lifei@163.com 李飞 123 lifei@163.com 用户名 密码 邮箱 李飞 123 lifei@163.com 李飞 123 lifei@163.com 李飞 123 lifei@163.com 李飞 123 lifei@163.com Process finished with exit code 0
2、判断字符串是否全部为数字，isalnum
test = "123_" v = test.isalnum() print(v)
3.判断字符串中是否全部为英文字母或者汉字 isalpha
test = "apple苹果" v = test.isalpha() print(v)
4.判断字符串中内容是否为数字
test = "二"
v = test.isdecimal() #仅识别数字
r = test.isdigit() #识别特殊字符 ②
j = test.isnumeric()# 识别汉字的数字
print(v,r,j)
5.是否存在不可显示的字符，例如：\n \t
test = "abscddd\ndddd\t" v = test.isprintable() print(v)
6.判断字符串中是否全部为空格，是为true 否则为false
test = " " v = test.isspace() print(v)
7.判断字符串是否为标题，并转换成标题。
test = "we are family" v1 = test.istitle() print(v1) v2 = test.title() print(v2) v3 = v2.istitle() print(v3)
8.将字符串中每一个元素按照指定分隔符进行拼接
test = "abcdefghigh" v = "_".join(test) print(v)
E:\project\venv\Scripts\python.exe E:/project/day1/s3.py a_b_c_d_e_f_g_h_i_g_h Process finished with exit code 0
9.判断字符串中是否为大/小写，并全部转换为大/小写
test = "aBCdefgh" v1 = test.islower() v2 = test.lower() print(v2.islower()) v3 = test.isupper() v4 = test.upper() print(v4.isupper()) print(v1,v2,v3,v4)
E:\project\venv\Scripts\python.exe E:/project/day1/s3.py True True False abcdefgh False ABCDEFGH Process finished with exit code 0
10.移除字符串中指定字符元素（字符串从左边/右边移除指定元素时，左边/右边起始位置必须为该元素才可以移除）
test = "abchabchhabc"
v1 = test.lstrip("abc")
v2 = test.rstrip("abc")
v3 = test.strip("abc")
print(test)
print(v1)
print(v2)
print(v3)
E:\project\venv\Scripts\python.exe E:/project/day1/s3.py abchabchhabc habchhabc abchabchh habchh Process finished with exit code 0
11.对应关系替换
test = "abddd;ajdlalddlldld;sakiiepwpj"
m = str.maketrans("aeiou","12345")
new_test = test.translate(m)
print(new_test)
12.分割为三部分
test = "abadks\njkdjalbskjaljdkalbk\nsjldalbklal"
v = test.partition(‘b‘)
print(v)
v1 = test.rpartition("b")
print(v1)
v2 = test.split("b",4)
print(v2)
v3 = test.splitlines(True)
print(v3)
v4 = test.splitlines()
print(v4)
E:\project\venv\Scripts\python.exe E:/project/day1/s3.py (‘a‘, ‘b‘, ‘adks\njkdjalbskjaljdkalbk\nsjldalbklal‘) (‘abadks\njkdjalbskjaljdkalbk\nsjldal‘, ‘b‘, ‘klal‘) [‘a‘, ‘adks\njkdjal‘, ‘skjaljdkal‘, ‘k\nsjldal‘, ‘klal‘] [‘abadks\n‘, ‘jkdjalbskjaljdkalbk\n‘, ‘sjldalbklal‘] [‘abadks‘, ‘jkdjalbskjaljdkalbk‘, ‘sjldalbklal‘] Process finished with exit code 0
12.以“”开头，以“”结尾
test = "abcef123"
v = test.endswith("a")
print(v)
v1 = test.startswith("a")
print(v1)
E:\project\venv\Scripts\python.exe E:/project/day1/s3.py False True Process finished with exit code 0
13.大小写转换
test = "abaCddd" v = test.swapcase() print(v)
14.判断是否为标识符
test = "def" v = test.isidentifier() print(v)
15.将指定字符替换为指定字符串
test = "1dddsdsdssffffgggg"
v = test.replace("ds","12",2)
print(v)
标签：tran 存在 拼接 数据类型 slow 分割 sde com exit
原文地址：https://www.cnblogs.com/panwj/p/9524855.html
