python 讀取 寫入txt文件

filename = 'pi_digits.txt'

with open(filename) as f:#默認以只讀方式打開文件
    lines = f.readlines()#讀取所有行，結果為列表，每行為列表一元素

for line in lines:
    print(line.rstrip())
    
with open(filename) as f:#默認以只讀方式打開文件
    lines = f.read()#讀取所有內容給變量，結果是一串字符
print(lines)

for line in lines:#將一字符串以單個字符分別顯示
    #print(line.rstrip())
    pass
filename = 'programming.txt'

with open(filename, 'a') as file_object:#以追加方式寫入文件，在原有內容后面增加新內容
    file_object.write("I also love finding meaning in large datasets.\n")
    file_object.write("I love creating apps that can run in a browser.\n")


filename = 'programming.txt'

with open(filename, 'w') as file_object:#以新建方式寫入文件，輸入新內容
    file_object.write("I also love finding meaning in large datasetsaaa.\n")
    file_object.write("I love creating apps that can run in a browseraaa.\n")