>>> dir(str) ['__add__', '__class__', '__contains__', '__delattr__', '__doc__', '__eq__', '__format__', '__ge__', '__getattribute__', '__getitem__', '__getnewargs__', '__getslice__', '__gt__', '__hash__', '__init__', '__le__', '__len...
l.append(value)returnlprint(dir(foo))# 通过 dir 查看函数的属性print(foo("a"), foo.__defaults__)print(foo("b", []), foo.__defaults__)print(foo("c"), foo.__defaults__)""" ['__annotations__', '__call__', '__class__', '__closure__', '__code__', '__defaults__'...
class ArgumentParser(self, prog=None, usage=None, description=None, epilog=None, parents=[], formatter_class=<class 'argparse.HelpFormatter'>, prefix_chars='-', fromfile_prefix_chars=None, argument_default=None, conflict_handler='error', add_help=True) ArgumentParser对象的参数都为关键字参数: ...
0,0)写一个自动化的小脚本deff():sht_3.range("A1:AZ48").column_width=1.1sht_3.range(...
flush=False)Prints the values to a stream,or to sys.stdout bydefault.Optional keyword arguments:file:a file-likeobject(stream);defaults to the current sys.stdout.sep:string inserted between values,defaulta space.end:string appended after the last value,defaulta newline.flush:whether to forcibly...
bool布尔型<class 'bool'>True, False 整型 【例子】通过print()可看出a的值,以及类 (class) 是int。 [16]: a = 1031 print(a, type(a)) # 1031 <class 'int'> 1031 <class 'int'> Python 里面万物皆对象(object),整型也不例外,只要是对象,就有相应的属性 (attributes) 和方法(methods)。
>>> class D(object):... def __init__(self, name):... self.name = name...>>> d = D("dd")>>> d.name'dd'>>> d.__dict__{'name': 'dd'}复制代码 定义了name,然后使用name,非常自然。但是也可以这样动态的赋值和使用age属性: >>>...
import foo import atexitdefcleanup(handle): foo.cleanup(handle)classBar(object):def__init__(self): ... atexit.register(cleanup,self.myhandle) This implementation provides a clean and reliable way of calling any needed cleanup functionality upon normal program termination. Obviously, it’s up to...
>>> import turtle as t>>> help(t.Pen)Help on class Turtle in module turtle:class Turtle(RawTurtle)| Turtle(shape='classic', undobuffersize=1000, visible=True)|| RawTurtle auto-creating (scrolled) canvas.|| When a Turtle object is created or a function derived from some| Turtle method...
2# Filename: func_default.py 3defsay(message,times=1): 4printmessage*times 5say('Hello') 6say('World',5) 7(源文件:code/func_default.py) 8输出 9$ python func_default.py 10Hello 11WorldWorldWorldWorldWorld 只有在形参表末尾的那些参数可以有默认参数值,即你不能在声明函数形参的时候,先声明...