0x01 open方法

r read
w write
a append
b byte
test.txt內容為
yicunyiye
wutang
讀取test.txt

f = open('test.txt','r',encoding='utf-8')
text = f.read()
print(text)

讀取一行

f = open('test.txt','r',encoding='utf-8')
text = f.readline()
print(text)

全部

f = open('test.txt','r',encoding='utf-8')
text = f.readlines()
print(text)
 

輸出

['yicunyiye\n', 'wutang\n']

美化

f = open('test.txt','r',encoding='utf-8')
text = f.readlines()
for t in text:
    print(t.strip().replace("\n",""))

輸出

yicunyiye
wutang

f = open('test.txt','r',encoding='utf-8')
for i in range(3):
    text = f.readline()
    print(text.strip().replace("\n",""))
 

輸出同上

0x02 with open as

這種就不需要f.close()了

with open('test.txt','r',encoding='utf8') as f:
    print(f.readlines())

寫入檔案

#w 不存在就建立 存在就覆蓋
with open('test_two.txt','w',encoding='utf8') as f:
    f.write('yicunyiye')

追加檔案

#a 不存在就建立 存在就追加
with open('test_two.txt','a',encoding='utf8') as f:
    f.write('\nniubi')