Python|将元组列表转换为列表

给定一个元组列表，编写一个Python程序将其转换为列表。

例子：

Input: [(11, 20), (13, 40), (55, 16)]
Output:[11, 20, 13, 40, 55, 16]

Input: [('Geeks', 2), ('For', 4), ('geek', '6')]
Output: ['Geeks', 2, 'For', 4, 'geek', '6']

以下是将元组列表转换为列表的方法。

方法#1：使用列表推导

# Python code to convert list of tuples into list
  
# List of tuple initialization
lt = [('Geeks', 2), ('For', 4), ('geek', '6')]
  
# using list comprehension
out = [item for t in lt for item in t]
  
# printing output
print(out)

输出：

['Geeks', 2, 'For', 4, 'geek', '6']

方法 #2：使用 itertools

# Python code to convert list of tuple into list
  
# Importing
import itertools
  
# List of tuple initialization
tuple = [(1, 2), (3, 4), (5, 6)]
  
# Using itertools
out = list(itertools.chain(*tuple))
  
# printing output
print(out)

输出：

[1, 2, 3, 4, 5, 6]

方法#3：使用迭代

# Python code to convert list of tuple into list
  
# List of tuple initialization
tup = [(1, 2), (3, 4), (5, 6)]
  
# result list initialization
result = []
  
for t in tup:
    for x in t:
        result.append(x)
  
# printing output
print(result)

输出：

[1, 2, 3, 4, 5, 6]

方法#4：使用sum

# Python code to convert list of tuple into list
  
# List of tuple initialization
tup = [(1, 2), (3, 4), (5, 6)]
  
# using sum function()
out = list(sum(tup, ()))
  
# printing output
print(out)

输出：

[1, 2, 3, 4, 5, 6]

方法#5：使用运算符和减少

# Python code to convert list of tuple into list
  
import operator
from functools import reduce
  
# List of tuple initialization
tup = [(1, 2), (3, 4), (5, 6)]
  
# printing output
print(list(reduce(operator.concat, tup)))

输出：

[1, 2, 3, 4, 5, 6]

方法 #6：使用lambda

# Python code to convert list of tuple into list
  
  
# List of tuple initialization
tup = [(1, 2), (3, 4), (5, 6)]
  
# Using map for 0 index
b = map(lambda x: x[0], tup)
  
# Using map for 1 index
c = map(lambda x: x[1], tup)
  
# converting to list
b = list(b)
c = list(c)
  
# Combining output
out = b + c
  
# printing output
print(out)

输出：

[1, 3, 5, 2, 4, 6]