Python语言程序设计基础（7）—— 文件和数据格式化

返回字符串

file = input()

#返回字符串
fo = open(file,"r").read(6)
print(fo)

返回列表形式

file = input()
fo = open(file,"r")
#print(fo)
#返回列表形式
print(fo.readlines(-1))

file = input()
fo = open(file,"r")

for line in fo.readlines():
    print(line.replace('\n',""))
fo.close()

file = input()
fo = open(file,"r")
for line in fo:
    print(line.replace('\n',""))
fo.close()

w+ 

打开一个文件用于读写。如果该文件已存在则打开文件，并从开头开始编辑，即原有内容会被删除。如果该文件不存在，创建新文件。

fname = input()
fo = open(fname,"w+")
ls = ["TreeDream","love","sea"]

fo.writelines(",".join(ls))
fo.seek(0)
for line in fo:
    print(line)
fo.close()