Pandigital | Python Fiddle

import time
chars = ['1', '0', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B']
targetbase = 7
startnums = []
# bases = []

def int2base(x,b,alphabet='0123456789abcdefghijklmnopqrstuvwxyz'):
    'convert an integer to its string representation in a given base'
    if b<2 or b>len(alphabet):
        if b==64: # assume base64 rather than raise error
            alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"
        else:
            raise AssertionError("int2base base out of range")
    if isinstance(x,complex): # return a tuple
        return ( int2base(x.real,b,alphabet) , int2base(x.imag,b,alphabet) )
    if x<=0:
        if x==0:
            return alphabet[0]
        else:
            return  '-' + int2base(-x,b,alphabet)
    # else x is non-negative real
    rets=''
    while x>0:
        x,idx = divmod(x,b)
        rets = alphabet[idx] + rets
    return rets

def superpan(num, base):
    pans = [None] * (base - 1)
    while 1:
        num = pan(num, base)
        pans[base - 2] = num
        for b in reversed(range(2, base)):
            res = checkpan(num, b)
            if res:
                pans[b - 2] = num
            else:
                num += 1
                break
        if all(pans):
            break
        else:
            num += 1
        # pause()
    return num

def pan(num, base):
    while 1:
        ispan = checkpan(num, base)
        if ispan:
            break
        else:
            num += 1
    return num

def pause():
    programPause = input("Press the <ENTER> key to continue...")

def ismember(A, B):
    c=[]
    for i in range(0, len(A)):
        if A[i] in B:
            c.append(1)
        else:
            c.append(0)
    return c

def checkpan(num, base):
    basenum = int2base(num, base)
    members = ismember(chars[0:base], list(str(basenum)))
    if sum(members) is members.__len__():
        res = 1
    else:
        res = 0
    return res

if __name__ == '__main__':
    for i in range(2, targetbase + 1):
        startnums.append(int(''.join(chars[0:i]), i))
    startnums.reverse()
    superpans = [None] * (targetbase - 1)

print(startnums)
    bases = list(range(2, targetbase + 1))
    bases.reverse()
    start = time.time()
    for base in range(1, targetbase):
        base1 = bases[base - 1]
        num = startnums[base - 1]
        superpans[base - 1] = superpan(num, base1)
        print('Superpandigital number of rank', base1, 'is', superpans[base - 1], 'from', num, '(', int2base(superpans[base - 1], base1), 'from', int2base(num, base1), ')')

end = time.time()
    print(end - start)

Python Fiddle

Python Cloud IDE