“\r\n”也不写入下一行

Question

我只是按照一个简单的 Python 脚本写入文本文件。建议的方法；在末尾添加“\n”不起作用。它在一个循环中打印，因为我正在使用 Windows，我也尝试过“\r\n”。它仍然只打印最后一项。我已经尝试将所有内容移动到循环内外（从 path 开始并以 file.close() 结束，但不行。这是怎么回事？

   #Assign variables to the shapefiles
park = "Parks_sd.shp"
school = "Schools_sd.shp"
sewer = "Sewer_Main_sd.shp"

#Create a list of shapefile variables
shapeList = [park, school, sewer]

path = r"C:/EsriTraining/PythEveryone/CreatingScripts/SanDiegoUpd.txt"
open(path, 'w')

for shp in shapeList:
    shp = shp.replace("sd", "SD")
    print shp


    file = open(path, 'w')
    file.write(shp + "\r\n")
    file.close()

Answer 1

在循环外打开文件

例如：

with open(path, "w") as infile:
    for shp in shapeList:
        shp = shp.replace("sd", "SD")
        infile.write(shp + "\n")

Answer 2

您可以 1) 在 for 循环之外打开文件和 2) 使用 writelines

with open(path, 'w+') as f:
    f.writelines([shp.replace("sd", "SD")+'\n' for shp in shaplist])

或

with open(path, 'w+') as f:
    f.writelines(map(lambda s: s.replace("sd", "SD")+'\n', shaplist))

这样，你打开文件一次，一旦写入行，文件就自动关闭（因为[with]）。

“\r\n”也不写入下一行

"\r\n" also not writing to next line

python

loops

file-writing

python-2.7