Python implementation of the removal of duplicate elements in the list of methods summarized [7 methods].

# !/usr/bin/env python
# -*- coding:utf-8 -*-
'''
__Author__:Yishui Cold City
Function: python list removal summary (7 methods)
'''
import sys
reload(sys)
import copy
("utf-8")
from collections import Counter
def func1(data_list):
 '''
 De-weighting using the built-in set method
 '''
 return list(set(data_list))
def func2(data_list):
 '''
 With the help of the dictionary method fromkeys
 '''
 return list({}.fromkeys(data_list).keys())
def func3(data_list):
 '''
 Using Class List Derivatives
 '''
 res_list=[]
 for one in data_list:
  if not one in res_list:
   res_list.append(one)
 return res_list
def func4(data_list):
 '''
 Using the sorted function (which is essentially still sorting using the set method)
 '''
 res_list=(data_list)
 res_list=sorted(set(data_list),key=data_list.index)
 return res_list
def func5(data_list):
 '''
 Using the 'Sort + Count' method
 '''
 result_list=[]
 temp_list=sorted(data_list)
 i=0
 while i<len(temp_list):
  if temp_list[i] not in result_list:
   result_list.append(temp_list[i])
  else:
   i+=1
 return result_list
def flagFunc(a):
 '''
 Boolean function
 '''
 if a in count_dict:
  count_dict[a]+=1
  return False
 else:
  count_dict[a]=1
  return True
def func6(data_list):
 '''
 Using the map method
 '''
 global count_dict
 count_dict={}
 tmp_list=map(flagFunc,data_list)
 return [data_list[i] for i in range(len(data_list)) if tmp_list[i]]
def func7(data_list):
 '''
 leveragecollectionsin the moduleCountermethodologies(频度过滤methodologies)
 '''
 fre_list=Counter(data_list).most_common(len(data_list))
 return [one[0] for one in fre_list]
if __name__=='__main__':
 data_list=[12,4,7,3,4,2,4,3,5,12,78,9,0,4,5,0,44,3]
 print func1(data_list)
 print func2(data_list)
 print func3(data_list)
 print func4(data_list)
 print func5(data_list)
 print func6(data_list)
 print func7(data_list)