我想用for循环外的0索引值创建一个新列表,然后使用for循环添加到相同的列表。我的玩具示例是:
import random
data = ['t1', 't2', 't3']
masterlist = [['col1', 'animal1', 'animal2', 'animal3']]
animals = ['cat', 'dog', 'chinchilla']
for item in data:
masterlist.append([item])
for animal in animals:
number1 = random.randint(1, 100)
number2 = random.randint(1, 100)
masterlist.append([str(number1) + ',' + str(number2)])
masterlist
但这输出:
[['col1', 'animal1', 'animal2', 'animal3'],
['t1'],
['52,69'],
['8,77'],
['75,66'],
['t2'],
['67,33'],
['85,60'],
['98,12'],
['t3'],
['60,34'],
['25,27'],
['100,25']]
我想要的输出是:
[['col1', 'animal1', 'animal2', 'animal3'],
['t1', '52,69', '8,77', '75,66'],
['t2', '67,33', '85,60', '98,12'],
['t3', '60,34', '25,27', '100,25']]
python大神给出的解决方案
这个解决方案会重构您的代码吗?
解决方案1
import random
data = ['t1', 't2', 't3']
masterlist = [['col1', 'animal1', 'animal2', 'animal3']]
animals = ['cat', 'dog', 'chinchilla']
for item in data:
rv = []
rv.append(item)
for animal in animals:
number1 = random.randint(1, 100)
number2 = random.randint(1, 100)
rv.append(str(number1) + ',' + str(number2))
masterlist.append(rv)
输出:
>>> masterlist
[['col1', 'animal1', 'animal2', 'animal3'],
['t1', '88,43', '85,62', '84,21'],
['t2', '44,99', '32,54', '83,50'],
['t3', '82,87', '90,83', '91,84']]
或者,以下内容将给出相同的结果。
解决方案2
import random
data = ['t1', 't2', 't3']
masterlist = [['col1', 'animal1', 'animal2', 'animal3']]
animals = ['cat', 'dog', 'chinchilla']
for item in data:
masterlist.append([item] + [f"{random.randint(1, 100)},{random.randint(1, 100)}" for animal in animals])
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