python字符串操作

[python] view plaincopy

1、Python提供ord函数，它取得一个字符做参数，并返回该字符的字符代码(ASCII码)。
2、Python中字符串是一个基本数据类型。字符串的是一种“不可变序列”，创建后就不能改变。
3、字符串的格式化
(1)、字符串的对齐
str = "wangyang"
print(str.center(50))
print(str.ljust(50))
print(str.rjust(50))
(2)、删除空格
str = "/twangyang/t"
print(str)
print(str.strip())
print(str.lstrip())
print(str.rstrip())

4、搜索字符串
string1 = "Test1, test2, test3, test4, Test5, test6"

print("/"test/" occurs %d times in %s/n" % (string1.count("test"), string1))

print("/"test/" occurs %d times after 18th character in %s/n" %(string1.count("test", 18, len(string1)), string1))

str = "Odd or even"

print("%s contains /"or/" starting at index %d" % (str, str.find("or")))

#find index of "even"
try:
    print("/"even/" index is %d" % (str.index("even")))
except ValueError:
    print("/"even/" does not occur in %s" % (str))

if str.startswith("Odd"):
    print("%s starts with /"Odd/"" % (str))


5、连接和分解字符串
split()和join()
string = "A, B, C, D, E"
print(string.split(","))
print(string.split(" "))
print(string.split(",", 2))

list1 = ["A", "B", "C", "D", "E"]
str = "_+_"
print(str.join(list1))

6 复制字符串 strcpy(sStr1,sStr2)
7 连接字符串 strcat(sStr1,sStr2)