Python Learning note-day3-python built-in functions

Python built-in functions

1.abs Absolute Value

2.all

determines whether all data in the iterator is true

returns True if all data of the data that can be iterated is true or the data that is iterated is empty. Otherwise returns false

3.any

determine if a data in the iterator is true

returns True if there is one data in the iterated data that is true. Otherwise, false is returned. The data that can be iterated is empty and also returns false

4.bin Convert Integer to a binary string (other data type error)

5.bool

converts a data to a Boolean bool that is a subclass of int, and returns False if the argument is false or does not specify a parameter

6.bytearray converting data to byte arrays

7.bytes convert data to byte array bytes is the immutable version of ByteArray

8.callable

determines whether an object can call a class that is callable. If the class of an object has a __call__ function that is callable

returns True if an object can be called. Otherwise returns false

9.chr convert integers to characters

10.classmethod

the class method class that gets the function accepts class as the first parameter, just like instance method accepts instance.

11.compil

compiling the source code or AST object code can be performed by calling exec () and eval ().

12.complex

creating a complex number create a complex number with real+imag*j, or convert a string or number to a plural

13.delattr

deletes the specified property delattr (obj, ' prop ') and Del obj.prop functions the same

14.dict Create a dictionary dictionary

15.dir

returns the property list of an object if the object is named __dir__ (), the method is called and must return the property list

16.divmod results and remainder of dividing two numbers

17.enumerate Get an enumeration object

18.eval executing an expression

19.exec Dynamic execution of Python code

20.filter Filter data to get an iterator

21.float Convert a string or number to floating point

22.format formatted Data

23.frozenset Get a new Frozenset object

24.getattr Get the value of the object property

25.globals Dictionary of the Global symbol table for the current module

26.hasattr

returns True if the object has a property, if name is a property of the object. Otherwise returns false

27.hash Get Object hash value

28.help back Help information

29.hex

converting integers to hexadecimal means using float.hex () to get the hexadecimal representation of floating-point numbers

30.id get the ID of the object (storing the memory number)

31.input output prompt, read user input

32.int Convert numbers or strings to integers

33.isinstance

determines whether an object is an instance of ClassInfo, and returns True if object is an instance of ClassInfo. Otherwise returns false

34.issunclass

determines whether a class is the parent of another class

returns True if the class is a subclass of another class. Otherwise returns false

35.iter get an iterator

36.len Returns the length of an object or the number of data in a collection

37.list Create a list

38.locals get the current symbol table dictionary

39.map change each data in the iterator to get a new iterator

40.max gets the largest of the largest or two or more parameters in the iterator

41.min Gets the smallest of the smallest or two or more parameters in the iterator

42.next Get the next data for the iterator

43.object

get an instance of object object without __dict__, cannot add property to object

44.oct

integer conversion to octal representation if x is not an int object, you must define a __index__ () function to return an integer

45.open

Opening a file and returning a stream can also read or write Stringio (text) or Bytesio (binary) as a file

46.ord to get the integer representation of the character

47.pow exponentiation equals pow (x, y)% Z Returns the result of Xy%z

48.print output data stream

49.property Get attributes (don't understand, forget him)

50.rang Creating a Range object

51.repr Gets the string representation of the object

52.reversed reverse sequence to get an iterator

53.round Floating-point numbers are rounded by scale

54.set Creating a Collection Object

55.setattr Changing the value of a property

56.slice getting a Shard object

57.sorted sort an iterative data to get a list

58.staticmethod

the static method of getting a function does not accept the first parameter that is hidden.

59.str

get the str version of the object STR is the built-in string class

60.sum calculates the total of the data that can be iterated

61.tuple Creating a tuple

62.type Returns the type of an object or creates a new type Object

63.vars getting attribute information

Python Learning note-day3-python built-in functions