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Amogh Singhal

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Update Python_Programming_Quiz.md

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`@@ -239,9 +239,14 @@ __First:__ This assigns 3, 4, and 5 to a, b, and c respectively <br>`
`239`	`239`	`__Second:__ Ths assigns 3 to a, b, and c <br>`
`240`	`240`	`>>> a=b=c=3`<br>
`241`	`241`
`242`		-#### 13. What is the `with` keyword in Python?
	`242`	+#### 14. What is the `with` keyword in Python?
`243`	`243`	The `with` statement in Python ensures that cleanup code is executed when working with unmanaged resources by encapsulating common preparation and cleanup tasks. <br>
`244`	`244`	`- It may be used to open a file, do something, and then __automatically close the file at the end.__`
`245`	`245`	`- It may be used to open a database connection, do some processing, then __automatically close the connection to ensure resources are closed and available for others__.`
`246`	`246`
`247`	`247`	`with` will __cleanup the resources even if an exception is thrown__
	`248`	`+`
	`249`	+#### 15. What is the `PYTHONPATH` variable?
	`250`	+`PYTHONPATH` is the variable that tells the __interpreter where to locate the module files imported into a program__.<br>
	`251`	`+Hence, it must include the Python source library directory and the directories containing Python source code. <br>`
	`252`	`+You can manually set PYTHONPATH, but usually, the Python installer will preset it.`

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