CODEWITHSUNDEEP
pythonpython-2.7recursion
Joshua Strot
Joshua Strot

Reputation: 2531

Recursively declaring variables - python

Normally I would never want to do this, but in this case I feel as though there's no alternative. I'm building a program in pyqt that has many label widgets, and alot of which are the same with the exception of a couple places on the geometry.

I would like to automate declaring them instead of having to declare them line by line which is taking up a lot of lines. It also looks pretty ugly.

Is there a way to say create ten variables like var1, var2, var3, etc. without having to declare them line by line?

Right now my code looks like-

self.folderheader1 = QtGui.QLabel(self.folders)
self.folderheader2 = QtGui.QLabel(self.folders)
self.folderheader3 = QtGui.QLabel(self.folders)
self.folderheader4 = QtGui.QLabel(self.folders)
...

Upvotes: 0

Views: 1040

Answers (2)

mgilson
mgilson

Reputation: 309929

You can do this with setattr, but I don't recommend it:

for i in range(1,5):
    setattr(self, 'folderheader%s' % i, QtGui.QLabel(self.folders))

Instead, might I suggest a list?

self.folderheaders = [QtGui.Qlabel(self.folders) for _ in range(1, 5)]

Now instead of self.folderheaders1 you have self.folderheaders[0] which isn't really that different...

Upvotes: 8

thefourtheye
thefourtheye

Reputation: 239473

You can use a dict like this

self.foldersdict = {}
for i in range(100):
    self.foldersdict[i] = QtGui.QLabel(self.folders)

You can later access them like this,

self.foldersdict[1]

Upvotes: 1

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