Q291. Is del the same as remove()? What are they?
del and remove() are methods on lists/ ways to eliminate elements. ```python >>> list=[3,4,5,6,7] ``` >>> del list[3] ```python >>> list ``` [3, 4, 5, 7] ```python >>> li...
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Q292. How do you open a file for writing?
Let's create a text file on our Desktop and call it tabs.txt. To open it to be able to write to it, use the following line of code- ```python >>> file=open('tabs.txt','w'...
Q293. Difference between the append() and extend() methods of a list.
The methods append() and extend() work on lists. While append() adds an element to the end of the list, extend adds another list to the end of a list. Let's take two list...
Q294. What are the different file-processing modes with Python?
We have the following modes- read-only – 'r' write-only – 'w' read-write – 'rw' append – 'a' We can open a text file with the option 't'. So to open a text file to read i...
Q295. What does the map() function do?
map() executes the function we pass to it as the first argument; it does so on all elements of the iterable in the second argument. Let's take an example, shall we? ```py...
Q296. Is there a way to remove the last object from a list?
Yes, there is. Try running the following piece of code- ```python >>> list=[1,2,3,4,5 ``` >>> list.pop(–1) 5 ```python >>> list ``` [1, 2, 3, 4]
Q297. How will you convert an integer to a Unicode character?
This is simple. All we need is the chr(x) built-in function. See how. ```python >>> chr(52) ``` '4' ```python >>> chr(49) ``` '1' ```python >>> chr(67) ``` 'C'
Q298. So does recursion cause any trouble?
Sure does: Needs more function calls. Each function call stores a state variable to the program stack- consumes memory, can cause memory overflow. Calling a function cons...
Q299. What good is recursion?
**Recursion** is a programming technique where a function solves a problem by calling itself with smaller sub-instances of the same problem until reaching a **base case**...
Q300. Can you remove the whitespaces from the string "aaa bbb ccc ddd eee"?
I can think of three ways to do this. Using join- ```python >>> s='aaa bbb ccc ddd eee' ``` >>> s1=".join(s.split()) ```python >>> s1 ``` 'aaabbbcccdddeee' Using a list c...