python怎么讀寫文件？

讀取操作# 一次性讀取整個文件內容

with open('致橡樹.txt', 'r', encoding='utf-8') as f:

print(f.read())

# 通過for-in循環逐行讀取

with open('致橡樹.txt', mode='r') as f:

for line in f:

print(line, end='')

time.sleep(0.5)

print()

# 讀取文件按行讀取到列表中

with open('致橡樹.txt') as f:

lines = f.readlines()

print(lines)

寫入操作import csv

class Teacher(object):

def __init__(self, name, age, title):

self.__name = name

self.__age = age

self.__title = title

self.__index = -1

@property

def name(self):

return self.__name

@property

def age(self):

return self.__age

@property

def title(self):

return self.__title

filename = 'teacher.csv'

teachers = [Teacher('駱昊', 38, '叫獸'), Teacher('狄仁杰', 25, '磚家')]

try:

with open(filename, 'w') as f:

writer = csv.writer(f)

for teacher in teachers:

writer.writerow([teacher.name, teacher.age, teacher.title])

except BaseException as e:

print('無法寫入文件:', filename)

else:

print('保存數據完成!')with open('prime.txt', 'w') as f:

for num in range(2, 100):

f.write(str(num) + '\n')

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