EncryptionTool.py

#GGearing
#Simple encryption script for text
#This was one my first versions of this script
#09/07/2017
from __future__ import print_function
import math
import sys

input_fun = None
key = int(math.pi * 1e14)

if sys.version_info.major >= 3:
    input_fun = input

else:
    input_fun = raw_input

text=input_fun("Enter text: ")
values= []
reverse= []
def encryptChar(target):
    #encrytion algorithm
    target=(((target+42) * key) -449)
    return target

def decryptChar(target):
    target=(((target+449) / key) -42)
    return target

def encrypt(input_text):
    col_values= []
    for i in range (len(input_text)):
        current=ord(input_text[i])
        current=encryptChar(current)
        col_values.append(current)
    return col_values

def decrypt(enc_text):
    col_values = []
    for i in range (len(enc_text)):
        current=int(decryptChar(enc_text[i]))
        current=chr(current)
        col_values.append(current)
    return col_values

def readAndDecrypt(filename):
    file=open(filename,"r")
    data=file.read()
    datalistint= []
    actualdata= []
    datalist=data.split(" ")
    datalist.remove('')
    for i in range(len(datalist)):
        datalistint.append(float(datalist[i]))
    for i in range(len(datalist)):
        current1=int(decryptChar(datalistint[i]))
        current1=chr(current1)
        actualdata.append(current1)
    file.close()
    return actualdata

def readAndEncrypt(filename):
    file=open(filename,"r")
    data=file.read()
    datalist=list(data)
    encrypted_list=list()
    encrypted_list_str=list()
    for i in range(len(datalist)):
        current=ord(datalist[i])
        current=encryptChar(current)
        encrypted_list.append(current)
    file.close()
    return encrypted_list

def readAndEncryptAndSave(inp_file,out_file):
    enc_list=readAndEncrypt(inp_file)
    output=open(out_file,"w")
    for i in range(len(enc_list)):
        output.write(str(enc_list[i])+" ")
    output.close()

def readAndDecryptAndSave(inp_file,out_file):
    dec_list=readAndDecrypt(inp_file)
    output=open(out_file,"w")
    for i in range(len(dec_list)):
        output.write(str(dec_list[i]))
    output.close()

#encryption
for i in range (len(text)):
    current=ord(text[i])
    current=encryptChar(current)
    values.append(current)

#decryption
for i in range (len(text)):
    current=int(decryptChar(values[i]))
    current=chr(current)
    reverse.append(current)
print(reverse)

#saves encrypted in txt file
output=open("encrypted.txt","w")
for i in range(len(values)):
    output.write(str(values[i])+" ")
output.close()

#read and decrypts
print(readAndDecrypt("encrypted.txt"))