Create unit4_ex4.3.1.py

Author: lironmiz

unit4_ex4.3.1.py

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+# exercise 4.3.1 from unit 4
+'''
+What things does a generator expression not allow to be use? Mark all the correct answers.
+'''
+
+# Answer: 
+# 1. accept arguments to it
+# 2. Wrapping a piece of code in a try-except block
+# 3. Combining a while loop
+# 4. Multiple use