My write( ) function is not working, why?-CodePudding

So, im new to coding and im making a registration system for a fictional hospital, that gets the user name, the procedure they had and the date, after that it sum some days to it( to calculate return) and then write on a .txt file, but the write part is not working is not working, how can i solve it? sorry that the prints and variables are on portuguese.

def cadastrar(arq, nomep , proc , x, y, z, w):
    datas = datetime.strptime(w, '%Y-%m-%d')
    l = 0
    m = 0
    n = 0
    o = 0
    p = 0
    try:
        a = open(arq, 'r ')
        for linha in a:
            dados = linha.split(';')
            if dados[1] in ['Procedimento X']:
                l = datas   \
                    timedelta(days = 15)
                m = datas   \
                    timedelta(days = 152)
                n = datas   \
                    timedelta(days = 304)
                o = datas   \
                    timedelta(days = 456)
                try:
                    a.write(f'{nomep};{proc};{x}-{y}-{z}\n;{l};{m};{n};{o}')
                except:
                    print('\033[31mErro ao escrever.\033[m')
                else:
                    print(f'\033[92m{nomep} foi cadastrado com sucesso.\033[m')
                    a.close()
    finally:
        print('')

I want it to write on the txt file but suddently it just stopped working and idk why.

CodePudding user response：

try changing

a = open(arq, 'r ')

to

a = open(arq, 'w ')

CodePudding user response：

Try using context manager for this, also repalace r with w , and then you don't need the close in finally and read the lines:

from datetime import datetime, timedelta

def cadastrar(arq, nomep , proc , x, y, z, w):
    datas = datetime.strptime(w, '%Y-%m-%d')
    l = 0
    m = 0
    n = 0
    o = 0
    p = 0
    try:
        with open(arq, 'w ') as f:
            for linha in f.readlines():
                dados = linha.split(';')
                if dados[1] in ['Procedimento X']:
                    l = datas   \
                        timedelta(days = 15)
                    m = datas   \
                        timedelta(days = 152)
                    n = datas   \
                        timedelta(days = 304)
                    o = datas   \
                        timedelta(days = 456)
                    try:
                        f.write(f'{nomep};{proc};{x}-{y}-{z}\n;{l};{m};{n};{o}')
                    except:
                        print('\033[31mErro ao escrever.\033[m')
                    else:
                        print(f'\033[92m{nomep} foi cadastrado com sucesso.\033[m')
    except Exception as e:
        print(f"Error writing to file - {e}")
    finally:
        print("Finished ... ")