read 读取整个文件
readline 读取下一行
readlines 读取整个文件到一个迭代器以供我们遍历
例:read方法打印文件里所有字符串
for line in open('artifacts.xml').read(): print(line) < ? x m l …………
f.read() Out[1]: "<?xml version='1.0' encoding='UTF-8'?>\n<?artifactRepository version='1.1.0'?>\n
readline方法只打印下一行的所有字符串
for line in open('artifacts.xml').readline(): print(line) < ? x m l ……
f = open('artifacts.xml') f.readline() Out[1]: "<?xml version='1.0' encoding='UTF-8'?>\n" f.readline() Out[1]: "<?artifactRepository version='1.1.0'?>\n"
readlines则是打印出所有行
for line in open('artifacts.xml').readlines(): print(line.strip()) <?xml version='1.0' encoding='UTF-8'?> <?artifactRepository version='1.1.0'?>
f = open('artifacts.xml') f.readlines() Out[1]: ["<?xml version='1.0' encoding='UTF-8'?>\n", "<?artifactRepository version='1.1.0'?>\n"]
可以看出直接使用 readlines方法 返回的是一个列表,readline返回的是字符串。