Python program can't open txt file - python-2.7

Question

I'm new to python and i'm trying to make a password manager.
the problem is that my program works fine when i run it through IDLE or Pycharm
but it stops running when i run it directly from windows when it reaches the line where I import the file where i store the password.
import time
user = raw_input("Username: ")
pw = raw_input("Password: ")
if user == "PrOoOg" and pw == "aka443":
def add_acc_func(acc, user, pw):
database.write("\nAccount: ")
database.write(acc)
database.write(" Username: ")
database.write(user)
database.write(" Password: ")
database.write(pw)
database.close()
def print_database_func():
for lines in database.readlines():
print lines.strip('\n')
database.close()
user_input = raw_input('Press "A" to add a new account\nPress "M" to modify and existing account\n'
'Press "D" to delete and existing account\nPress "S" to show all accounts and passwords\n')
user_choice = user_input.lower()
if user_choice == "a":
database = open("source.txt", "a") #Everything worked fine when i deleted this line
acc_to_add = raw_input("Write the name of the site or service: ").lower()
acc_to_add_user = raw_input("Write the username or email you want to set for that account: ")
acc_to_add_pw = raw_input("Write the password you want to set to that account: ")
add_acc_func(acc_to_add, acc_to_add_user, acc_to_add_pw)
print "Account added"
if user_choice == "s":
database = open("source.txt", "r") #Everything worked fine when i deleted this line
print_database_func()
raw_input("Press Enter to quit")
else:
print ("Wrong username or password")
time.sleep(3)
I tried to delete the lines where I import the text file and it worked.
i don't know why the code can't open the file when opened from windows and can open it when opened from IDLE or Pycharm

Answer 1

"it's just crashes when i run it from windows (rightclick ==> open with ==> python.exe)"
When you do this the working directory is C:\Windows\system32. Most likely you don't have write permissions to this directory. When running the script using the other methods the working directory is most likely the one containing the script. You need to change to a directory which you have write permissions for.
Here is an example to use the current user's Documents folder:
import os
dir = os.path.expanduser('~/Documents')
os.chdir(dir)