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filename = 'example.txt' if filename.find('.') != -1: ext = filename[filename.rfind('.')+1:] print(ext) else: print('无扩展名') 3.根据分隔符拆分字符串: pythonCopy codes = '1,2,3,4,5' while s: index = s.find(',') if index == -1: print(s) break print(s[:index...
defis_file_match(filename,patterns):forpatterninpatterns:iffnmatch.fnmatch(filename,pattern):returnTruereturnFalse deffind_specific_files(root,patterns=['*'],exclude_dirs=[]):forroot,dirnames,filenamesinos.walk(root):forfilenameinfilenames:ifis_file_match(filename,patterns):yieldos.path.join(...
file-like Object:像open()函数返回的这种有个read()方法的对象,在Python中统称为file-like Object。除了file外,还可以是内存的字节流,网络流,自定义流等等。file-like Object不要求从特定类继承,只要写个read()方法就行。 StringIO就是在内存中创建的file-like Object,常用作临时缓冲。 • 写文件 调用open( ...
for file in find_file: print "Found File at %s" % file else: print "Not Found" 例子:在e:/py和e:/phpwww目录下找以a到d开头的.php的文件 E:py>python_cook [a-d]*.php e:/py;e:/phpwww 2 match e:/phpwwwcurl.php e:/phpwwwduoxiancheng.php ...
username=browser.find_element_by_name('user')username.send_keys('学号')#输入密码 password=browser.find_element_by_name('pwd')password.send_keys('密码')#选择“学生”单选按钮 student=browser.find_element_by_xpath('//input[@value="student"]')student.click()#点击“登录”按钮 ...
1. find() rfind() index() rindex() count() find() rfind() 分别用来查找一个字符串在当前的字符串指定的范围(默认是整个字符串)中,首次和最后一次出现的位置,如果不存在则返回-1; index() rindex() 分别用来返回当前字符串指定范围中首次和最后一次出现的位置,如果不存在则抛出异常; ...
格式控制o表示将整数转换为八进制,x和X表示将整数转换为十六进制。 a='%o%o'%(100,-100) print(a) #指定宽度为8,八进制,将100转换为8进制 s='%8o%8o'%(100,-100) print(s) s='%x%X'%(445,-445) print(s) s='%8x%8X'%(445,-445) #长度为8 print(s) s='%08x%08X'%(445,-445) pr...
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You will also find complete function and method references: Reference Overview Built-in Functions String Methods List/Array Methods Dictionary Methods Tuple Methods Set Methods File Methods Python Keywords Python Exceptions Python Glossary Random Module ...