文件操作：open(文件路徑，mode="模式"，encoding="utf-8")mode:r 讀w 寫a 追加+ 擴展b 字節操作 非文本文件read() #讀文件readline()讀一行for line in f:print (line)write(1.txt)#寫文件with open (1.txt) as f:XXXXf.close()#關閉打開的文件
# 讀取文件
f =open("D:/py/文件讀取/123.txt",mode ="r",encoding="utf-8")print(f.read())#全部讀取
# w 寫入文件# w 模式下可以幫我們創建文件# w寫入的一瞬間，會清空源文件內容寫入新內容
f =open("D:/py/文件讀取/1234.txt",mode ="w",encoding="utf-8")
f.write("笑傲江湖")
f.write("令狐沖\n")
f.write("東方不敗\n")
f.write("任盈盈\n")
f.write("任我行\n")
f.write("岳靈珊\n")
f.write("林平之\n")# a 寫入文件# f = open ("D:/py/文件讀取/12345.txt",mode = "a" ,encoding="utf-8")# f.write("令狐沖\n")# f.write("東方不敗\n")# f.write("任盈盈\n")# f.write("任我行\n")# f.write("岳靈珊\n")# f.write("林平之\n")# mode : r+ 讀寫操作# w+ 寫讀# a+ 追加寫讀# mode : b 字節bytes 不需要給出編碼，讀寫非文本文件（圖片，音樂，視頻等）# 文件復制# f1 = open("D:/py/文件讀取/雨.jpg",mode="rb")# f2 = open("D:/py/文件讀取/1/雨.jpg",mode="wb")# for line in f1:# f2.write(line)# f1.close() # 關閉文件連接# f2.close()# with open("D:/py/文件讀取/123456.txt",mode="w","utf-8") as f: # 打開文件完成后自動關閉# f.write("AAAAAAAAAAAA")# 文件修改# 創建一個文件副本# 從源文件中讀取內容，加載到內存，然后在內存進行修改，寫入到文件副本# 然后刪除源文件# 把副本文件重名成原文件名字# with open("D:/py/文件讀取/顏色_副本",mode="w",encoding="utf-8") as f1,\# open ("D:/py/文件讀取/顏色",mode="r",encoding="utf-8") as f2:# for line in f2:#從源文件中讀取內容# line = line.replace("黑","嘿嘿嘿嘿嘿嘿額嘿嘿嘿嘿hi欸")# f1.write(line)# 寫入到新文件# os.remove("顏色")# os.rename("顏色_副本","人名單")# 文件操作讀取固定格式的數據# f = open("D:/py/文件讀取/水果",mode = "r",encoding= " utf-8")# lit = [] #最終承載數據的地方# for line in f:# line = line.strip() #"1,蘋果，9.9，10000"# line_lst = line.split(",") #[1,蘋果，9.9，10000]# num = line_lst[0]# name = line_lst[1]# price = line_lst[2]# count = line_lst[3]# dic = {"編號":num,"名稱":name,"價格":price,"庫存":count}# lit.append(dic)# print (lit)#w = open("D:/py/文件讀取/url2.txt",mode="w",encoding="utf-8")# f = open("D:/py/文件讀取/url1.txt",mode = "r",encoding= " utf-8")## for line in f:# line = line.strip(" ")# line_lst = line.split()# for gpc in line_lst[0].split(" "):# None# for gpc1 in line_lst[1].split():# None# for gpc2 in line_lst[2].split("、"):# None## print (gpc + " " + gpc1 + " " + gpc2 )withopen('filename')as f:#把操作的結果, 賦給as后面的對象print(f.read())
