ython檔案IO讀寫

一．文字資料

# 整個的檔案以字串的形式讀取

with open('somefile.txt', 'rt') as f:
data = f.read()
# 通過每行迭代讀取檔案
with open('somefile.txt', 'rt') as f:
for line in f:
# 處理讀取行的顯示

#　寫字元檔案到文字檔案，覆蓋掉文字中之前的檔案

with open('somefile.txt', 'wt') as f:
f.write("text1")
f.write("text2")
#　寫字元檔案到文字檔案,儲存之前的文字檔案在後面新增
with open('somefile.txt', 'at') as f:
f.write("text1")
f.write("text2")

from tempfile import temporaryfile

with temporaryfile('w+t') as f:
f.write('hello world\n')
f.write('testing\n')
f.seek(0)
data = f.read()
print(data)

from tempfile import temporaryfile

def read():
with open('/home/jon/mydoc/test', 'rt') as f:
data = f.read()
print(data)
def read1():
f = open('/home/jon/mydoc/test', 'rt')
data = f.read()
print(data)
f.close()
def write():
with open('/home/jon/mydoc/test', 'wt', encoding='utf-8') as f:
f.write("hello,world!")
def write1():
with open('/home/jon/mydoc/test', 'at', encoding='utf-8') as f:
f.write("welcome python !")
with temporaryfile('w+t') as f:
f.write('hello world\n')
f.write('testing\n')
f.seek(0)
data = f.read()
print(data)
if __name__ == "__main__":
read()
print("------using 'rt' read-------")
read1()
print("-----using 'at' write--------")
write1()
read()
print("------using 'wt' write-------")
write()
read()
temporaryfile()

hello world

testing
hello,jon!
------using 'rt' read-------
hello,jon!
-----using 'at' write--------
hello,jon!
welcome python !
------using 'wt' write-------
hello,world!
process finished with exit code 0

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