如何在python列表中的元组中识别值？

Question

I'm looking for some pythonic solution to check if there are True or False in a tuple inside of a list.

I did like this:

varList = [(True,)]
temp = varList.pop(0)
result = temp[temp.index(True,)]
print result

#############
# If there are more complex result 
varList = [(True, False, False), (True, False)]    

How to do this in a better way?

Answer 1

if your intention is to check if the value True exists in a tuple or tuples you could use any keyword like the following :

true_exists = [ any(subset) for subset in varList ]

you also check if all the elements are True using the all keyword

Answer 2

尝试

result = True in varList[0]

Answer 3

In case you want also want to return the index of the tuple as well as the index of the occurence within than tuple, you can try:

  def isValueInList(varList, value):
       return [(varList[lst][i],lst,i) for lst in range(len(varList)) for i in range(len(varList[lst])) if varList[lst][i] == value]

 print(isValueInList(varList, True))

The result will be:

[(True, 0, 0), (True, 1, 0)]

where:

First argument means that value was found.

Second argument specifies the index of the tuple within the list.

Third argument specifies the index of the value that was found within that tuple.

Here is the suggested edit using enumerate :

def isValueInList(varList, value):

   return [(val,innerInd, tupInd) for tupInd, tup in enumerate(varList) for innerInd, val in enumerate(tup) if val==value]

print(isValueInList(varList, True))

The result will be:

[(True, 0, 0), (True, 1, 0)]