AoC Day 8 Python 3

# day8
import re

input = "d8_data.txt"
test = "d8_test.txt"

def read_file(filename):
    with open(filename) as f:
        return f.read().splitlines()


data = read_file(input)

# Each Operation gets stored in a dict, which are stored in an array
def get_instructions(data):
    trouble = []
    for line in data:
        instructions = re.match(r"(.+) (.+)$", line)
        if instructions:
            operation = instructions.group(1)
            parameter = instructions.group(2)
            trouble.append({'Operation':operation,'Parameter':int(parameter),'Acc before':0,'Acc after':0,'Visited':False})
    return trouble

# Running through the troubled data
def find_loop(trouble,index):
    i=0
    prev=0
    bfr=0
    order = []

    # updating the current operation set
    def update_item(jmp,i,bfr,par):
        trouble[i]['Visited'] = True
        trouble[i]['Acc before'] = bfr
        trouble[i]['Acc after'] = bfr
        if not jmp:
            trouble[i]['Acc after'] = par + bfr

    while (True):
        if (i>=len(trouble)):
            break
        opr = trouble[i].get('Operation')
        par = trouble[i].get('Parameter')
        bfr = trouble[prev].get('Acc after')
        prev = i
        #order.append(str(i)+' | '+str(bfr)+' | '+opr+' '+str(par))

        # stop on seen item
        if (trouble[i].get('Visited')):
            #print('Order:')
            #for calc in order: print(calc)
            return str(bfr)

        if (opr=='nop'):
            update_item(False,i,bfr,0)
            i += 1
            continue

        if (opr=='acc'):
            update_item(False,i,bfr,par)
            bfr += par
            i += 1
            continue

        if (opr=='jmp'):
            update_item(True,i,bfr,par)
            i = i+par
            continue

    return "Real answer: "+str(bfr)+" Index:"+str(index)


# find the operation to change
def repair_trouble(trb):
    trouble = trb

    # toggle encounterd jmp and nop
    def toggle(operation):
        opr = operation.get('Operation')
        if opr == 'jmp':
            operation['Operation']='nop'
            return operation
        elif opr == 'nop':
            operation['Operation']='jmp'
            return operation

    #check each operation and toggle if needed. Then get result.
    for operation in trouble:
        if not (operation.get('Operation')=='acc'):
            operation = toggle(operation)
            res = (find_loop(trouble,trouble.index(operation)))
            if re.match(r"(.+) (.+)$",res):
                print(res)
                break
            operation = toggle(operation)
            #print(troubled_data)
        else:
            res = (find_loop(trouble,trouble.index(operation)))
            #print(troubled_data)
            if re.match(r"(.+) (.+)$",res):
                print(res)
                break
        #needed to reset to initial state
        for visit in trouble:
            visit['Visited']=False
            visit['Acc after']=0
            visit['Acc before']=0



troubled_data = get_instructions(data)
#print(troubled_data)
print(repair_trouble(troubled_data))

#print(find_loop(troubled_data,0))