Python Road (ii)--list, Yuan Zu, dictionary

Some of the functions defined within the list

• Append: Adds a new object at the end of the list.

  Function prototypes: def append (self, p_object)

  Usage:

  List1.append (P_object)

• Clear: Empty list

  Function prototype: def clear (self)

  Usage:

  List1.clear ()

• Count: Count the number of occurrences of an element in a list

  Function prototypes: def count (self, value)

  Usage:

  List1.count (value)

• Extend: Appends multiple values from another sequence at the end of the list (expands the original list with a new list)

  Function prototypes: def extend (self, iterable)

  Usage:

  List1.extend (iterable)

• Extend: Appends multiple values from another sequence at the end of the list (expands the original list with a new list)

  Function prototypes: Def index (self, value, Start=none, Stop=none)

  Usage:

  List1.extend (iterable)

• Index: Find a value from the list where the first occurrence of a match is indexed, no error is found

  Function prototypes: Def index (self, value, Start=none, Stop=none)

  Usage:

  List1.index (value,m,n) Find value in #在 [m,n) interval

• Insert: Inserting an object into a list

  Function prototypes: def insert (self, index, p_object)

  Usage:

  List1.insert (Index,object)

• Pop: Deletes an object, deletes the last one by default, and returns the object

  Function prototypes: Def pop (self, index=none)

  Usage:

  List1.pop (Index)

• Remove: Deletes a specified object

  Function prototype: def remove (self, value)

  Usage:

  List1.remove (value)

• Reverse: Reverse List

  Function prototype: def reverse (self)

  Usage:

  List1.reverse ()

• Sort: Sorting the original list

  Function prototypes: def sort (self, key=none, reverse=false)

  Usage:

  List1.sort (Key,reverse)

Ganso Some functions defined within a tuple

• Count: The number of members in the statistics meta-ancestor

  Function prototypes: def count (self, value)

  Usage:

  Tuple.count (value)

• Index: Find the index position of the first occurrence of a value from the meta-ancestor, no error found

  Function prototypes: Def index (self, value, Start=none, Stop=none)

  Usage:

  Tuple1.index (value,m,n) Find value in #在 [m,n) interval

Some functions defined within the dictionary Dict

• Clear: Clears the contents of the dictionary

  Function prototype: def clear (self)

  Usage:

  Dict1.clear ()

• Fromkeys: Create a new dictionary

  Function prototypes: Def fromkeys (*args, **kwargs)

  For example:

seq = ( ' hello ',  ' hello ',  ' python ') Dict1 = Dict.fromkeys (SEQ) print (dict1) Dict1 = Dict.fromkeys (seq, 10) print (dict1)  #输出结果为 #{' Hello ': None, ' World ': None, ' Python ': none} #{' Hello ': ten, ' World ': Ten, ' Python ': ten}         

• Get: Returns the value of the specified key, if the value does not return a D value in the dictionary, the default is None

  Function prototype: def get (self, k, d=none)

  Usage:

  Dict1.get (k,d)

• Items: Returns a traversed (key, value) tuple array

  Function prototype in a list: def items ( Self)

  Usage:

  Dict1.items ()

• Keys: Returns a dictionary with a list all keys

  Function prototype: def Keys (self)

  Usage:

  Dict1.keys ()

• Pop: Delete the value of the dictionary given key key, the return value is the deleted value. The key value must be given, if no key found, to return the D

  Function prototype: def pop (self, k, d=none)

  Usage:

  Dict1.pop (k,d)

• Popitem: Delete last pair of keys and values in Dictionary

  Function prototype: def popitem (self)

  Usage:

  Dict1.popitem ()

• SetDefault: Similar to get (), but if the key does not exist in the dictionary, the key will be added and the value will be set to default

  Function prototypes: Def setdefault (self, k, d=none)

  Usage:

  Dict1.setdefault (K,D)

• Update: Updates the key/value pairs of another dictionary into this dictionary

  Function prototypes: def update (self, e=none, **f)

  Usage:

  Dict1.update (DICT2)

• Values: Returns all values in the dictionary as a list

  Function prototypes: def values (self)

  Usage:

  Dict1.values ()

Python Road (ii)--list, Yuan Zu, dictionary