python列表合并

‘壹’ python如何把几个列表合并成一个由列表组成的列表

没有缩进，看不出你具体的意思。大概看了一下，是两个for 嵌套，语句肯定是有问题。
你可以把数据范例，和有缩进的源码截图，再发一下。

‘贰’ 在python中如何将两个list合并成一个list，不用for语句

1、运算符：

list1 = [1, 2, 3]

list2 = [4, 5, 6]

list3 = list1 + list2

print(list3)

2、extend()方法：

list1 = [1, 2, 3]

list2 = [4, 5, 6]

list3 = list1.extend(list2)

print(list3)

3、切片方式:

list1 = [1, 2, 3]

list2 = [4, 5, 6]

list1[len(list1):len(list1)] = list2

print(list1)

(2)python列表合并扩展阅读：

list的方法

L.append(var) #追加元素

L.insert(index,var)

L.pop(var) #返回最后一个元素，并从list中删除之

L.remove(var) #删除第一次出现的该元素

L.count(var) #该元素在列表中出现的个数

L.index(var) #该元素的位置,无则抛异常

L.extend(list) #追加list，即合并list到L上

L.sort() #排序

L.reverse() #倒序

list 操作符:,+,*，关键字del

a[1:] #片段操作符，用于子list的提取

[1,2]+[3,4] #为[1,2,3,4]。同extend()

[2]*4 #为[2,2,2,2]

del L[1] #删除指定下标的元素

del L[1:3] #删除指定下标范围的元素

‘叁’ python列表如何合并并把values相加

a=[
['A','B',2.0],
['B','C',2.0],
['C','D',71.99],
['C','B',267.7],
['A','B',26.95],
['D','C',2.6328],
['B','D',23.262],
['D','A',10.0],
['B','C',3.9331]
]

res={}
foriina:
ifres.has_key(tuple(i[:2])):
res[tuple(i[:2])]=res[tuple(i[:2])]+i[2]
else:
res[tuple(i[:2])]=i[2]
result=[]
fork,vinres.items():
result.append([k[0],k[1],v])
printresult

‘肆’ python中如何实现列表元素内容合并

list1=['a','b','c']
list2=['1','2','3']
n=len(list1)
list3=[]
foriinrange(0,n):
	list3.append('')
foriinrange(0,n):
	list3[i]=list1[i]+list2[i]
print(list3)

‘伍’ 如何在python中把两个列表的各项分别合并为列表

1、新建一个将两个列表组合成一个列表.py。

‘陆’ python怎么合并两个列表的内容

~$ python
Python 2.7.3 (default, Mar 14 2014, 11:57:14)
[GCC 4.7.2] on linux2
Type "help", "right", "credits" or "license" for more information.
>>> a = [1, 2, 5, 8 ,12，6,1]
>>> b = [25, 13, 6, 9,3,2]
>>> a + b
[1, 2, 5, 8, 12, 6,1，25, 13, 6, 9，3,2]
>>>

‘柒’ python list 合并

defmerge(*lsts):
"""mergelistswithforloop"""
result=[]
forsublstinlsts:
result.extend(sublst)
returnresult

or

defmerge(*lsts):
"""mergelistswithrecude"""
returnrecude(lambdax,y:x+y,lsts)

example:

$python
Python2.7.3(default,Mar142014,11:57:14)
[GCC4.7.2]onlinux2
Type"help","right","credits"or"license"formoreinformation.
>>>defmerge(*lsts):
...returnrece(lambdax,y:x+y,lsts)
...
>>>merge([1,2,3,4],[5,6,7,8])
[1,2,3,4,5,6,7,8]
>>>merge([1,2,3,4],[3,5,9],[53,12,52,2])
[1,2,3,4,3,5,9,53,12,52,2]
>>>defmerge(*lsts):
..."""mergelistswithforloop"""
...result=[]
...forsublstinlsts:
...result.extend(sublst)
...returnresult
...
>>>merge([1,2,3,4],[5,6,7,8])
[1,2,3,4,5,6,7,8]
>>>merge([1,2,3,4],[3,5,9],[53,12,52,2])
[1,2,3,4,3,5,9,53,12,52,2]
>>>

‘捌’ python如何合并两个列表的内容

~$python
Python2.7.3(default,Mar142014,11:57:14)
[GCC4.7.2]onlinux2
Type"help","right","credits"or"license"formoreinformation.
>>>a=[1,2,5,8,12]
>>>b=[25,13,6,9]
>>>a+b
[1,2,5,8,12,25,13,6,9]
>>>

‘玖’ 求问Python大神，怎样合并一个列表中的各个元素

list=[['0','16'],['1','13'],['16','34'],['13','15'],['1','28']]
l=[]
i=j=0
whilei<len(list):
flag=0
whilej<len(list)-i:
iflist[i][1]==list[j][0]:
l+=[[int(list[i][0]),int(list[i][1]),int(list[j][1])]]
dellist[j]
flag=1
break
j+=1
ifflag==0:
l+=[[int(list[i][0]),int(list[i][1])]]
i+=1
print(l)

‘拾’ python两个列表进行合并

A=[['A','A1'],['B','A2'],['C','A3'],['D','A4']]
B=[['A','B1'],['B','B2'],['C','B3'],['D','B4']]
C=[['A','C1'],['B','C2'],['C','C3'],['D','C4']]
D=[['A','D1'],['B','D2'],['C','D3'],['D','D4']]
arr=[A,B,C,D]
dic_all={x[0][0]:[y[1]foryinx]forxinzip(*arr)}
list_all=[[x[0][0]]+[y[1]foryinx]forxinzip(*arr)]

if__name__=='__main__':
print(list_all)
print(dic_all)

结果:

[['A','A1','B1','C1','D1'],['B','A2','B2','C2','D2'],['C','A3','B3','C3','D3'],['D','A4','B4','C4','D4']]
{'D':['A4','B4','C4','D4'],'A':['A1','B1','C1','D1'],'C':['A3','B3','C3','D3'],'B':['A2','B2','C2','D2']}