字典键的有序更改（Python）

Question

I know it is possible to change the keys in a dictionary. But is it possible to change all the keys using a defined pattern? In this case I have a dictionary that contain:

{'>Apple': 'Orange', '>Grape': 'Hopz'}

Question: All key's contain a '>' + string. Can I remove these '>' and update? Or update without '>'?

Little background: In my script I try to compare one dictionaries values to this examples keys which results in an error. I assume this is due to the '>' because v =! k if k = '>foo' and v = 'foo'

If any of you are scientist this '>' is a result of a fasta parser. Which I could probably just change the script to not write the '>' at the start of a line (I haven't tried this..yet).

Answer 1

It's easy enough with a dict comprehension:

updateddict = {k.lstrip('>'): v for k, v in yourdict.iteritems()}

for Python 2.7. For Python 3, use yourdict.items() instead.

For Python 2.6 and earlier, where there is no dict comprehension syntax yet, use:

updateddict = dict((k.lstrip('>'), v) for k, v in yourdict.iteritems())

str.lstrip() is a quick and concise method to remove any > characters from the start of a key.