Python-2.7写入文件

Question

我有这样的剧本：

f = open("/ggg/darr/file/", "r+")
a = 0
for line in f:
    if a ==58:
         print (line)
         line1 = "google.ca"
         f.write(line1)
         print line
    a = a+1
f.close()

我想保存我的文件，但只想将第58行写的内容更改为"google.ca“，然后使用linux: mint-17.2保存它。

Answer 1

# Read data from file
with open('yourfile.txt', 'r') as file:
    # read all line in the file to data array
    data = file.readlines()

# change data on line 58 (array start from 0) 
data[57] = 'Data you need to change'

# Write data back 
with open('yourfile.txt', 'w') as file:
    file.writelines(data)

Answer 2

您需要决定是编写一个新文件(使用打印)还是更改旧文件(使用r+模式和f.write)。如果你写了一个新的文件，你可能会感到最快乐。

Answer 3

dataRead = []
f = open("/ggg/darr/file/", "r+")
a = 0
for line in f:
    if a == 58:
       line = "google.ca"
    dataRead.append(line)
    a = a+1
f.close()

f2 = open("/some/new/file","w")
for line in dataRead:
    f2.write(line)
f2.close()