python怎么读写文件
python怎么读写文件?
读取操作
# 一次性读取整个文件内容with open('致橡树.txt', 'r', encoding='utf-8') as f: print(f.read())# 通过for-in循环逐行读取with open('致橡树.txt', mode='r') as f: for line in f: print(line, end='') time.sleep(0.5)print()# 读取文件按行读取到列表中with open('致橡树.txt') as f: lines = f.readlines()print(lines)
写入操作
import csvclass 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.__titlefilename = 'teacher.csv'teachers = [Teacher('骆昊', 38, '叫兽'), Teacher('狄仁杰', 25, '砖家')]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('无法写入文件:', filename)else: print('保存数据完成!')
with open('prime.txt', 'w') as f: for num in range(2, 100): f.write(str(num) + '')