Python I/O 檔案操作Demo
import os
# __file__ 表示當前檔案路徑
print(__file__)
# os.getcwd() 表示當前的工作目錄
print(os.getcwd())
#桌面路徑
#1. 在當前檔案目錄下新建資料夾 pyTest,用__file__絕對路徑也可以
if not os.path.exists('./pyTest'):
os.mkdir("./pyTest")
#2. 改變當前目錄
os.chdir(os.getcwd() + '\\pyTest')
print(os.getcwd())
#3. 在pyTest中新建檔案 1.txt
fileObj = open('./1.txt', 'a+')
for i in range(100):
fileObj.write(str(i) + '\n')
fileObj.flush()
fileObj.close()
#4. 讀取1.txt
fileObj = open('./1.txt', 'r')
# readline() 方式讀取
# while True:
# lineStr = fileObj.readline()
# if lineStr:
# print(lineStr, end='')
# else:
# break
# next() 方式讀取
#try:
# while True:
# lineStr = next(fileObj)
# if lineStr:
# print(lineStr, end='')
# else:
# break
#except Exception as e:
# pass
# iter 迭代器方式讀取 推薦使用
#iter = iter(fileObj)
#for line in iter:
# print(line, end='')
# 感覺和上面的迭代器沒啥區別
iter = iter(fileObj)
try:
while True:
line = next(iter)
if line:
print(line, end='')
else:
break
except Exception as e:
pass
fileObj.close()
os.chdir('../')
print(os.getcwd())
# 刪除非空資料夾
shutil.rmtree('pyTest')