#Open filewith open("data.txt","r") as fileHandler:#Read next lineline =fileHandler.readline()#check line is not emptywhileline:print(line.strip()) line= fileHandler.readline() 列表的内容将是. Hello Thisisa sample f
setp2: 通过read、readline、readlines方法读取文件内容 step3: 通过close方法关闭文件对象 b. 区别: 示例:test.txt read方法:读取全部数据,结果为一个字符串(所有行合并为一个字符串) #打开文件f =open('/labcenter/python/pandas/test.txt')#使用read方法读取文件data1 = f.read()printdata1 type(data1)#关...
# 读取csv文件 import csv with open('test.csv','r') as myFile: lines=csv.reader(myFile) for line in lines: print (line) csv模块写入文件: import csv with open('test.csv','w+') as myFile: myWriter=csv.writer(myFile) # writerrow一行一行写入 myWriter.writerow([7,8,9]) myWriter...
""" readinto() -> Undocumented. Don't use this; it may go away. """ pass def readline(self, size=None): # real signature unknown; restored from __doc__ 仅读取一行数据 """readline([size]) -> next line from the file, as a string. Retain newline. A non-negative size argument ...
Python read fileSince the file object returned from the open function is a iterable, we can pass it directly to the for statement. read_file.py #!/usr/bin/python with open('works.txt', 'r') as f: for line in f: print(line.rstrip()) The example iterates over the file object to...
""" 文件操作 代码示例""" file=open("file.txt","r",encoding="UTF-8")print(type(file))#<class'_io.TextIOWrapper'>print("read 函数读取文件一行内容: ")# 读取文件所有内容 line=file.readline()print(line) 执行结果 : 代码语言:javascript ...
>>> with open(filePath, 'r') as f: f.read().splitlines() ['Line One: 1',...
read_data = file.read() except FileNotFoundError as fnf_error: print(fnf_error) except : #except子句可以忽略异常的名称,将被当作通配符使用,可以使用这种方法打印一个错误信息,然后再次把异常抛出,raise print("Unexpected error:", sys.exc_info()[0]) ...
在File对象上调用read()或write()方法。 通过调用File对象上的close()方法来关闭文件。 我们将在接下来的章节中回顾这些步骤。 用open()函数打开文件 要用open()函数打开一个文件,你要给它传递一个字符串路径,指明你要打开的文件;它可以是绝对路径,也可以是相对路径。open()函数返回一个File对象。 尝试使用记事...
exfile = open('example_file2', 'w')print(exfile)在上图中，可以当前文件对象是写入模式(' w ')，在下面的代码块中，我们将向这个文件中添加一行文本:exfile.write('This is example file 2 \n')当然，也可以添加更多的行:exfile.write('Line number 2, in example file 2')exfile.close()注意，在...