Python: Filter list by prefix and/or suffix

getFilteredList.py

def getFilteredList(list=[], pfx='', sfx=''):
    filteredList = []
    for item in list:
        isMatch = False
        if pfx and not sfx: isMatch = item.startswith(pfx)
        if not pfx and sfx: isMatch = item.endswith(sfx)
        if pfx and sfx: isMatch = item.startswith(pfx) and item.endswith(sfx)
        if isMatch: filteredList.append(item)
    return filteredList

mayaExample.py

import maya.cmds as cmds
fullList = cmds.ls(type='transform')
filteredList = getFilteredList(fullList, pfx='SpineFK', sfx='')

renamer.py

import maya.cmds as mc

def renamer(pfx='', sfx='', new_pfx='', new_sfx=''):
    fullList = cmds.ls(type='transform')
    filteredList = getFilteredList(fullList, pfx=pfx, sfx=sfx)
    
    for item in filteredList:
        if pfx and item.startswith(pfx):
            new_name = '{}{}'.format(new_pfx, item[len(pfx):])
            mc.rename(item, new_name)
        if sfx and item.endswith(pfx):
            new_name = '{}{}'.format(item[:len(sfx)], new_sfx)
            mc.rename(item, new_name)


# renamer(sfx='null', new_sfx='ERIKS')

renamer2.py

import maya.cmds as mc


def getFilteredList(list=[], pfx='', sfx=''):
    filteredList = []
    for item in list:
        isMatch = False
        if pfx and not sfx: isMatch = item.startswith(pfx)
        if not pfx and sfx: isMatch = item.endswith(sfx)
        if pfx and sfx: isMatch = item.startswith(pfx) and item.endswith(sfx)
        if isMatch: filteredList.append(item)
    return filteredList


def shortName (objPath=''):
    return objPath.split("|")[-1]


def rename_wrapper (a, b):
    print(a, b)
    mc.rename(a, b)


# Repad string ending with desired padding
def repad (value, pad=4):
    stripped = value.rstrip('1234567890').lstrip('0')
    num = value[len(stripped):].lstrip('0')
    numpadded = num.zfill(pad)
    return '{}{}'.format(stripped, numpadded)


def renamer(objects=[], pfx='', sfx='', new_pfx='', new_sfx='', pad=None):
      
    # Replacement   
    filteredList = getFilteredList(objects, pfx=pfx, sfx=sfx)

    if pad:
        for item in objects:
            shortendName = shortName(item)
            new_name = repad(shortendName, pad)
            rename_wrapper(item, new_name)

    if pfx or sfx:
        for item in filteredList:
            shortendName = shortName(item);
            if (pfx and shortendName.startswith(pfx)):
                new_name = '{}{}'.format(new_pfx, shortendName[len(pfx):])
                rename_wrapper(item, new_name)
            
            if (sfx and item.endswith(sfx)):
                new_name = '{}{}'.format(shortendName[:len(sfx)*-1], new_sfx)
                rename_wrapper(item, new_name)

    # Append
    if not pfx and not sfx:
        for item in objects:
            shortendName = shortName(item);
            if new_pfx:
                new_name = '{}{}'.format(new_pfx, shortendName)
                rename_wrapper(item, new_name)
            if new_sfx:
                new_name = '{}{}'.format(shortendName, new_sfx)
                rename_wrapper(item, new_name)


def renameSelected(pfx='', sfx='', new_pfx='', new_sfx='', pad=None):
    objects = mc.ls(sl=True)
    renamer(objects=objects, pfx=pfx, sfx=sfx, new_pfx=new_pfx, new_sfx=new_sfx, pad=pad)
        
                
#renameSelected(pfx='pSphere', new_pfx='pSphere_')
#renameSelected(sfx='', new_sfx='_NOTAWESOME')
#renameSelected(pfx='group2_', new_pfx='')
#renameSelected(pad=4)

repad.py

# Repad string ending with desired padding
def repad (value, pad=4):
    stripped = value.rstrip('1234567890')
    num = value[len(stripped):]
    numpadded = num.zfill(pad)
    return '{}{}'.format(stripped, numpadded)

test.py

origList = ['bob1', 'bob2', 'bob3', 'fred1', 'fred2', 'fred3', 'george3']
# Tests below should print True
print(getFilteredList(origList, pfx='bob', sfx='') == ['bob1', 'bob2', 'bob3'])
print(getFilteredList(origList, pfx='fred', sfx='') == ['fred1', 'fred2', 'fred3'])
print(getFilteredList(origList, pfx='', sfx='3') == ['bob3', 'fred3', 'george3'])
print(getFilteredList(origList, pfx='bob', sfx='3') == ['bob3'])