如何编写python从名为“file1.txt”的文本文件中读取前两行将从“file1.txt”读取的两行写入新文件“file2.txt”答案

【问题标题】：How write python to Read the first two lines from a text file named "file1.txt" Write the two lines read from "file1.txt" to a new file "file2.txt"如何编写python从名为“file1.txt”的文本文件中读取前两行将从“file1.txt”读取的两行写入新文件“file2.txt”
【发布时间】：2022-06-13 12:24:35
【问题描述】：

从名为“file1.txt”的文本文件中读取前两行，将从“file1.txt”中读取的两行写入新文件“file2.txt”

【问题讨论】：

标签： python new-operator file-handling readlines console.writeline

【解决方案1】：

a_file = open("file1.txt", "r")
number_of_lines = 2
with open("file2.txt", "w") as new_file:
    for i in range(number_of_lines):
        line = a_file.readline()
        new_file.write(line)
a_file.close()

我确信某处有更简洁的解决方案，但这会奏效！希望对你有帮助:)

【讨论】：

【解决方案2】：

对于 2 行：

with open("file1.txt", "r") as r:
    with open("file2.txt", "w") as w:
        w.write(r.readline() + r.readline())

每次调用r.readline()，都会转到下一行。因此，如果您想阅读n 行；使用：

请注意，如果第一行末尾有新行 (\n)，.readline() + r.readline() 只有 2 个单独的行

with open("file1.txt", "r") as r:
    with open("file2.txt", "w") as w:
        # Change 2 to number of lines to read
        for i in range(2):
            w.write(r.readline())

【讨论】：

【解决方案3】：

f1=open("file1.txt","r")
f2=open("file2.txt","w")
fcontent=f1.readline()
f2.write(fcontent)
fcontent=f1.readline()
f2.write(fcontent)
f1.close()
f2.close()

【讨论】：

【解决方案4】：

写一个Python程序来

从名为“file1.txt”的文本文件中读取前两行
将从“file1.txt”读取的两行写入一个名为 "file2.txt"
读取“file2.txt”并打印内容

fhandle1 = open("file1.txt","r")
fhandle2 = open("file2.txt","w")

str = fhandle1.readline()
fhandle2.write(str)
str = fhandle1.readline()
fhandle2.write(str)

fhandle1.close()
fhandle2.close()

fhandle3 = open("file2.txt")
print(fhandle3.read())
fhandle3.close()

【讨论】：

【解决方案5】：

#以阅读模式打开file1

fhandle1 = open("file1.txt","r")

#以写入模式打开file2

fhandle2 = open("file2.txt","w")

str = fhandle1.readline()
fhandle2.write(str)
str = fhandle1.readline()
fhandle2.write(str)

fhandle1.close()
fhandle2.close()

fhandle3 = open("file2.txt")
print(fhandle3.read())
fhandle3.close()

【讨论】：