day04学习笔记零散

[poqweur]

# handle = open("test.txt")

print(r"D:\pytest\code\test.txt")
print("D:\pytest\code\test.txt")

handle = open("D:/pytest/code/test.txt", "r")
data = handle.read()
print(data)
handle.close()

handle = open("D:/pytest/code/test.txt", "r")
data = handle.readline()  # 只读取一行
print(data)
data = handle.readlines()  # 读取所有行
print(data)
handle.close()
# 分块读取
handle = open('test.txt', 'r')
for line in handle:
    print(line)
handle.close()

handle = open('test.txt', 'r')
while True:
    data = handle.read(1024)
    print(data)
    if not data:
        break

# 读取二进制
#handle = open('day01.ipynb', 'rb')

# 写文件
handle = open('test.txt', 'w')
handle.write("这是一个测试！")
handle.close()

# with的使用
with open('test.txt') as file_handler:
    for line in file_handler:
        print(line)

# 异常使用
try:
    file_handler = open("test.txt")
    for line in file_handler:
        print(line)
except IOError:
    print("An IOError has occurred!")
finally:
    file_handler.close()

以上是代码

 

以下是运行结果

text.txt

h
e
l
l
o