Hw2 tuliavko

HW2_Tuliavko/README.md

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+# Calculator for basic arithmetic 
+This repository contains the script for calculating simple mathematical expressions. 
+
+### System requirements:
+
+Key packages and programs:
+- [Python](https://www.python.org/downloads/) (version >= 3.9)
+
+### Run calculator:
+
+Execute `extract_interface_residues.py` script provided here to start calculations. Then enter your expression in the line below in following format: the first number, the operation sign + for sum, - for subsctraction, / for division or \* for multiplication and the second number. Note that numbers must be separated by a space from the sign!! To run calculations press the `Enter` key.
+
+For example:
+```
+# launch calculator
+python extract_interface_residues.py
+# input expressions
+Enter your expression:1 + 2
+3
+```
+
+### Authors:
+
+*This is the repo for the second homework of the BI Python 2023 course*
+
+- Badmadashiev Dorzhi
+- Vedekhina Veronika
+- Tulyavko Vlada
+- Matveeva Ksenia
+- Vaganova Polina
+
+
+![Our team](./team.jpg) 
+

HW2_Tuliavko/calculator.py

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+# definitions of functions
+def subtraction(num1, num2):
+    return num1 - num2
+
+def addition(num1, num2):
+    return num1 + num2
+
+def multiplication(num1, num2):
+    return num1 * num2
+
+def division(num1, num2):
+    if num2 == 0:
+        print('Error: division by zero! :(')
+    else:
+        return num1 / num2
+
+def main():
+    task = input('Enter your expression:')
+    task = task.split(" ")
+    num1, num2 = float(task[0]), float(task[2])
+    mode = task[1]
+    return operations[mode](num1, num2)
+
+
+# dictionary with functions names
+operations = {'/': division,
+              '-': subtraction,
+              '+': addition,
+              '*': multiplication
+              }
+# start calculations
+result = main()
+print(result)