讀取檔案

# 讀取檔案 with的作用 不用給自己開啟或關閉檔案 系統會在合適的時候自己關閉檔案 避免了提前關閉讀取不到資料 或忘記關閉的情況
with open('C:\\Users\\Administrator\\Desktop\\py\\text.txt') as file_object:
	mess=file_object.read()
	print(mess)
	
# 逐行讀取
with open('C:\\Users\\Administrator\\Desktop\\py\\text.txt') as file_lines:
	for line in file_lines:
		print(line)
	
# 單獨每行列印的時候 會有空白行 因為檔案每行後面有個換行符	
#abcdefgdfghjkl

#dddddddddewfwergrg

#gergbhtbtrbnrwbn

#rbtwrtbhwtbrwnbwbwr	
# 解決空白行方法
with open('C:\\Users\\Administrator\\Desktop\\py\\text.txt') as file_liness:
	for line in file_liness:
		print(line.rstrip())

#abcdefgdfghjkl        結果
#dddddddddewfwergrg
#gergbhtbtrbnrwbn
#rbtwrtbhwtbrwnbwbwr

#建立一個包含檔案內容的列表
with open('C:\\Users\\Administrator\\Desktop\\py\\text.txt') as file_lbs:
	lbs=file_lbs.readlines()
print(lbs)	  #['abcdefgdfghjkl\n', 'dddddddddewfwergrg\n', 'gergbhtbtrbnrwbn\n', 'rbtwrtbhwtbrwnbwbwr\n']
 

寫入檔案

#建立一個包含檔案內容的列表
with open('C:\\Users\\Administrator\\Desktop\\py\\text.txt') as file_lbs:
	lbs=file_lbs.readlines()
print(lbs)	  #['abcdefgdfghjkl\n', 'dddddddddewfwergrg\n', 'gergbhtbtrbnrwbn\n', 'rbtwrtbhwtbrwnbwbwr\n']


# 寫入檔案 r 讀 w寫 a 新增
with open('C:\\Users\\Administrator\\Desktop\\py\\text.txt','w') as file_x:
	file_x.write("abcde")
with open('C:\\Users\\Administrator\\Desktop\\py\\text.txt') as file_object:
	mess=file_object.read()
	print(mess)     #abcde 此時檔案中的內容就只有 abcde

# 新增
with open('C:\\Users\\Administrator\\Desktop\\py\\text.txt','a') as file_add:
	file_add.write("asdf.\n")  # 不換行？？？？？
with open('C:\\Users\\Administrator\\Desktop\\py\\text.txt') as file_object:
	mess=file_object.read()
	print(mess)     #abcdeasdfg