bf# Python esolang interpreter

bfsint.py

#!/usr/bin/python3
# Python interpreter for Brainfuck# (bf#) by TheCrimulo
# bf# by TheCrimulo
# Open domain, feel free to use
#
# paukkupalika: brainkek
# me: yustin b-evr
import sys

# Get filename, open it and convert it to a plain string.
if len(sys.argv) == 1:
    with open('bfsint.py', 'r+') as f:
        for l in f.readlines():
            print(l)
        quit()
filename = sys.argv[1]
with open(filename, 'r') as f:
    evr = f.read().replace('\n', '')

# Tape and pointers
tape = list(range(256))
for i in tape:
    tape[i] = 0;
pointer_pos = 0
cycle = 0

# Extra vars
assign = []
stack = list(range(1))
for i in stack:
    stack[i] = 0;
depthl = 0
depthlsave = 0
# Iterate through each character and interpret the actions
#for i in range(0, len(evr)):
i = 0
while i < len(evr):
    cval = tape[pointer_pos]
    if evr[i] == ">":
        pointer_pos += 1
    elif evr[i] == "<":
        pointer_pos -= 1
    elif evr[i] == "+":
        tape[pointer_pos] += 1
    elif evr[i] == "-":
        tape[pointer_pos] -= 1
    elif evr[i] == ".":
        print('#i' + str(pointer_pos) + ': ' + str(cval))
    elif evr[i] == "@":
        asciival = str(chr(tape[pointer_pos]))
        print('#a' + str(pointer_pos) + ': ' + asciival)
    elif evr[i] == "$":
        f = i + 1
        while evr[f] != "*":
            assign.append(evr[f])
            f += 1
        assl = ''.join(assign)
        assld = int(assl, 16)
        tape[pointer_pos] = assld
    # $2A*[>++[>++<-]<-]
    elif evr[i] == "[":
        depthl += 1
        depthlsave = depthl
        if cval == 0:
            while (evr[i] != "]") or (depthl != depthlsave):
                i += 1
                if evr[i] == "[":
                    depthl += 1
                if evr[i] == "]":
                    depthl -= 1
            continue
        else:
            stack.append(i)
    elif evr[i] == "]":
        if cval == 0:
            if len(stack) == 1:
                del stack[0]
                continue
            else:
                lenstack = len(stack) - 1
                del stack[lenstack]
                continue
        else:
            i = stack[len(stack) - 1]
    i += 1