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”

Question

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”

Answer 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()

我敢肯定在某个地方有一个更整洁的解决方案，但这会奏效！ 希望它可以帮助你:)

Answer 2

编写一个 Python 程序来

1. 从名为“file1.txt”的文本文件中读取前两行
2. 将从“file1.txt”读取的两行写入一个名为“file2.txt”的新文件
3. 阅读“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()

Answer 3

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()时，它都会转到下一行。 因此，如果您想阅读n行； 利用：

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

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())

Answer 4

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()

Answer 5

 f1 = open("file1.txt","r")

    f2 = open("file2.txt","w")

    str = f1.readline()
    f2.write(str)
    str = f1.readline()
    f2.write(str)
    
    f1.close()
    f2.close()
    
    f3 = open("file2.txt")
    print(f3.read())
    f3.close()

Answer 6

fhandle1 = open("file1.txt")
fhandle2 = open("file2.txt","w")
fcontents = fhandle1.readline()
fhandle2.write(fcontents)
fcontents = fhandle1.readline()
fhandle2.write(fcontents)
fhandle1.close()
fhandle2.close()

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

Answer 7

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

l1 = fhandle1.readline()

l2 = fhandle1.readline()

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

fhandle2.write(l1)

fhandle2.write(l2)

fhandle2 = open("file2.txt")

print(fhandle2.read())

fhandle2.close()