sequence类型都支持的通用操作: 成员检查:in、not in 连接:+ 复制:* 下标取值:s[i] 切片:s[i : j] 长度检查:len(s) 最小值:min(s) 最大值:max(s) 索引取值:s.index(i) 字符串统计:s.count(i) String Methods 判断类方法,通常返回一个布尔值:str.endswith(suffix[, start[, end]]):判断字符...
'r',encoding='utf-8') as f:print(hasattr(f, "__next__")) # 判断是否迭代器 content = islice(f, 2, 4)for line in content: print(line.strip())### 输出结果：Truepython is a cat.this is the end.本节内容较多，简单回顾一下：迭代器是一...
my_string = "Hello"for char in my_string: print(char)实际上完全等价于：my_string = "Hello"my_iterator = iter(my_string)print(next(my_iterator)) # 输出：Hprint(next(my_iterator)) # 输出：eprint(next(my_iterator)) # 输出：lprint(next(my_iterator)) # 输出：lprint(next(my...
字符串与in和not运算符 与列表值一样,in和not in操作符也可以用于字符串。使用in或not in连接两个字符串的表达式将求值为布尔型True或False。在交互式 Shell 中输入以下内容: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 >>>'Hello'in'Hello, World'True>>>'Hello'in'Hello'True>>>'HELLO'in'Hel...
# of each line of text on the clipboard. import pyperclip text = pyperclip.paste() # Separate lines and add stars. lines = text.split('\n') for i in range(len(lines)): # loop through all indexes in the "lines" list lines[i] = '* ' + lines[i] # add star to each string ...
"<string>", line 3, in <module> File "<string>", line 2, in a File "<string>",...
ascii(object):ascii()函数返回任何对象(字符串,元组,列表等)的可读版本。ascii()函数将用转义符替换所有非ascii字符:chu(x):返回Unicode代码为x的字符format(value, format_spec=''):返回按format_spec格式化后的字符串,同string.format()方法ord(c):返回字符c的un...
__init__在C中的具体实现函数为_io_StringIO___init___impl,签名如下: /*[clinic input] _io.StringIO.__init__ initial_value as value: object(c_default="NULL") = '' newline as newline_obj: object(c_default="NULL") = '\n' ...
for line in f: print(line) # Writing to a file # 使用with写入文件 contents = {"aa": 12, "bb": 21} with open("myfile1.txt", "w+") as file: file.write(str(contents)) # writes a string to a file with open("myfile2.txt", "w+") as file: ...