Showing posts with label Python. Show all posts
Showing posts with label Python. Show all posts
Thursday 7 May 2020
Handling Exceptions | Python
You can catch an exception by implementing the try—except construct. This
construct is broken into 2 major parts:
• try block. The try block indicates the code which is to be monitored for the
exceptions listed in the except expressions.
• except clause. You can use an optional except clause to indicate what to do when certain classes of exception/error occur (e.g. resolve the problem or generate a warning message). There can be any number of except clauses in sequence checking for different types of error/exceptions.
For more detail explanation , check this below link:
https://docs.python.org/3/tutorial/er...
Python for beginners:
https://www.youtube.com/watch?v=egq7Z...
Mathematical Operations on Set | Python
Prerequisite:
Set | Python | Castor Classes
https://www.youtube.com/watch?v=DNlWy...
Python for beginners:
https://www.youtube.com/watch?v=egq7Z...
Web 🌐http://www.clcoding.com/
Telegram: https://t.me/clcoding_python
https://www.facebook.com/pirawenpython/
https://www.facebook.com/groups/piraw...
Nth term of GP | Python
Code:
a=int(input('Enter the first term'));
b=int(input('Enter the second term'));
N=int(input('Enter the n value')); # 2 4 8 16 32
r=b/a;
s=a*r**(N-1);
print(s);
Prerequisite:
Power of a number | Python | Castor Classes
https://www.youtube.com/watch?v=omFAv...
Python for beginners:
https://www.youtube.com/watch?v=egq7Z...
Is Subsequence | Python
Prerequisite:
String in Python | Part 2.3 | Castor Classes
https://www.youtube.com/watch?v=65z1V...
Check the problem statement here:
https://leetcode.com/problems/is-subs...
Python for beginners:
https://www.youtube.com/watch?v=egq7Z...
Code:
class Solution:
def isSubsequence(self, s: str, t: str) -> bool:
g=0;
for i in s:
if(i in t):
rs=t.index(i);
t=t[rs+1:];
else:
g+=1;
if(g==0):
return True;
else:
return False;
Code:
class Solution:
def isSubsequence(self, s: str, t: str) -> bool:
g=0;
for i in s:
if(i in t):
rs=t.index(i);
t=t[rs+1:];
else:
g+=1;
if(g==0):
return True;
else:
return False;
help & tab completion | Python
Topics discussed in this video:
a)Getting help in Python & some important methods related to String--
1).isalpha()
2).isalnum()
3).islower()
4).isupper()
b)tab completion in Python
Python for beginners:
https://www.youtube.com/watch?v=egq7Z...
Tuesday 5 May 2020
what are the difference between LIST , TUPLE and SET in python ?
The tuple, list, set, dictionary are trying to solve the most important problems in programming, called, storage of data and retrieval of stored data in a way that is both easy to use, to code and to read for the programmers.
The big problems are:
- space availability
- insertion
- searching by value or position
- updating
- make the operations faster for big/huge data sets
Tuple:
When you only store data that you aren't changing and don't need to do search by value as you know the position.
List:
When you store data that you changing, inserting if fast and don't need to do search/update by value as you know the position
Set:
When you store data that changes from times to time, but most importantly you need very fast search by value as you don't know position then you use sets.The search is very fast as the set is indexed in memory and fast binary search used. Inserting and deletion is slow.
Dictionary:
When you need fast search, data doesn't change often, few updates and inserts. Is just advanced set where you store a group of key and value and search by the key.
Monday 4 May 2020
Largest Number At Least Twice of Others | Python
Python for beginners:
https://www.youtube.com/watch?v=egq7Z...
Code:
class Solution:
def dominantIndex(self, nums: List[int]) -> int:
f=max(nums);
rs=nums.index(f);
u=[];
g=0;
for i in nums:
if(i!=f):
u.append(i);
if(len(u)!=0):
g=max(u);
if(f>=2*g):
return rs;
else:
return -1;
Ransom Note | Python
Python for beginners:
https://www.youtube.com/watch?v=egq7Z...
Code:
class Solution:
def canConstruct(self, ransomNote: str, magazine: str) -> bool:
g=0;
for i in ransomNote:
t=ransomNote.count(i);
s=magazine.count(i);
if(t>s):
g+=1;
if(g==0):
return True;
else:
return False;
Telegram: https://t.me/clcoding_python
https://www.facebook.com/pirawenpython/
https://www.facebook.com/groups/piraw...
Code:
class Solution:
def canConstruct(self, ransomNote: str, magazine: str) -> bool:
g=0;
for i in ransomNote:
t=ransomNote.count(i);
s=magazine.count(i);
if(t>s):
g+=1;
if(g==0):
return True;
else:
return False;
Telegram: https://t.me/clcoding_python
https://www.facebook.com/pirawenpython/
https://www.facebook.com/groups/piraw...
Search Insert Position | Python
Python for beginners:
https://www.youtube.com/watch?v=egq7Z...
Code:
class Solution:
def searchInsert(self, nums: List[int], target: int) -> int:
if(target in nums):
return nums.index(target);
else:
if(target<min(nums)):
return 0;
elif(target>max(nums)):
return len(nums);
else:
g=0;
m=0;
while(g<len(nums)):
if(nums[g]>target):
m=g;
break;
g=g+1;
return m;
Intersection of Two Arrays | Python
Check the problem statement here:
The intersection of Two Arrays:
https://leetcode.com/problems/interse...
Python for beginners:
https://www.youtube.com/watch?v=egq7Z...
Code:
class Solution:
def intersection(self, nums1: List[int], nums2: List[int]) -> List[int]:
output=[];
for i in nums1:
if(i in nums2 and i not in output):
output.append(i);
return output;
Telegram: https://t.me/clcoding_python
https://www.facebook.com/pirawenpython/
https://www.facebook.com/groups/piraw...
Code:
class Solution:
def intersection(self, nums1: List[int], nums2: List[int]) -> List[int]:
output=[];
for i in nums1:
if(i in nums2 and i not in output):
output.append(i);
return output;
Telegram: https://t.me/clcoding_python
https://www.facebook.com/pirawenpython/
https://www.facebook.com/groups/piraw...
Jewels and Stones | Python
Prerequisites for solving this particular question:
String Immutability & count method | Python | Castor Classes
https://www.youtube.com/watch?v=Am1vX...
Iterate over a list & string | List in Python | Part 4 | Castor Classes
https://www.youtube.com/watch?v=4Zrfk...
You can get the problem statement here:
https://leetcode.com/problems/jewels-...
Python for beginners:
https://www.youtube.com/watch?v=egq7Z...
Code:
class Solution:
def numJewelsInStones(self, J: str, S: str) -> int:
c=0;
for i in J:
c+=S.count(i);
return c;
If Expressions in Python
Prerequisite:
if else command | Python
https://www.youtube.com/watch?v=9GJWK...
Java code used in this video:
import java.util.*;
public class Hello {
public static void main(String args[])
{
Scanner obj=new Scanner(System.in);
int x=obj.nextInt();
String s=(x%2==0)?"Even":"Odd";
System.out.println(s);
}
}
Python for beginners:
https://www.youtube.com/watch?v=egq7Z...
Telegram: https://t.me/clcoding_python
https://www.facebook.com/pirawenpython/
https://www.facebook.com/groups/piraw...
if else command | Python
https://www.youtube.com/watch?v=9GJWK...
Java code used in this video:
import java.util.*;
public class Hello {
public static void main(String args[])
{
Scanner obj=new Scanner(System.in);
int x=obj.nextInt();
String s=(x%2==0)?"Even":"Odd";
System.out.println(s);
}
}
Python for beginners:
https://www.youtube.com/watch?v=egq7Z...
Telegram: https://t.me/clcoding_python
https://www.facebook.com/pirawenpython/
https://www.facebook.com/groups/piraw...
Separate 0’s and 1’s in an array | Python
Python for beginners:
https://www.youtube.com/watch?v=egq7Z..
Code:
l=int(input());
i=0;
m=[];
zeros=0;
while(i<l):
y=int(input());
if(y==0):
zeros+=1;
m.append(y);
i+=1;
i=0;
while(i<l):
if(i<zeros):
m[i]=0;
else:
m[i]=1;
i=i+1;
print(m);
Telegram: https://t.me/clcoding_python
https://www.facebook.com/pirawenpython/
https://www.facebook.com/groups/piraw...
https://www.youtube.com/watch?v=egq7Z..
Code:
l=int(input());
i=0;
m=[];
zeros=0;
while(i<l):
y=int(input());
if(y==0):
zeros+=1;
m.append(y);
i+=1;
i=0;
while(i<l):
if(i<zeros):
m[i]=0;
else:
m[i]=1;
i=i+1;
print(m);
Telegram: https://t.me/clcoding_python
https://www.facebook.com/pirawenpython/
https://www.facebook.com/groups/piraw...
Find first set bit | Python
Python for beginners:
https://www.youtube.com/watch?v=egq7Z...
Code:
t=int(input());
i=0;
while(i<t):
a=int(input());
rs=bin(a)[2:];
y=list(rs);
y.reverse();
if('1' in y):
io=y.index('1');
print(io+1);
else:
print(0);
i=i+1;
Telegram: https://t.me/clcoding_python
https://www.facebook.com/pirawenpython/
https://www.facebook.com/groups/piraw...
https://www.youtube.com/watch?v=egq7Z...
Code:
t=int(input());
i=0;
while(i<t):
a=int(input());
rs=bin(a)[2:];
y=list(rs);
y.reverse();
if('1' in y):
io=y.index('1');
print(io+1);
else:
print(0);
i=i+1;
Telegram: https://t.me/clcoding_python
https://www.facebook.com/pirawenpython/
https://www.facebook.com/groups/piraw...
Saturday 2 May 2020
List membership Testing using in | Part 8 | Python
Code:
class Solution:
def checkIfExist(self, arr: List[int]) -> bool:
g=0;
for i in arr:
if(i*2 in arr and i!=0):
g=1;
break;
elif(i*2 in arr and arr.count(2*i)>=2):
g=1;
break;
if(g==0):
return False;
else:
return True;
Problem Link: Check If N and Its Double Exist: https://leetcode.com/problems/check-i... Python for beginners: https://www.youtube.com/watch?v=egq7Z...
Problem Link: Check If N and Its Double Exist: https://leetcode.com/problems/check-i... Python for beginners: https://www.youtube.com/watch?v=egq7Z...
Prime Number of Set Bits in Binary Representation | Python
Prerequisite:
Brian Kernighan’s Algorithm | Python | Castor Classes
https://www.youtube.com/watch?v=DUSCd...
Python for beginners:
https://www.youtube.com/watch?v=egq7Z...
Telegram: https://t.me/clcoding_python
https://www.facebook.com/pirawenpython/
Telegram: https://t.me/clcoding_python
https://www.facebook.com/pirawenpython/
Brian Kernighan’s Algorithm | Python
Code:
class Solution:
def countBits(self, num: int) -> List[int]:
bum=[];
i=0;
while(i<=num):
bum.append(i);
i=i+1;
output=[];
for i in bum:
count=0;
while(i>0):
i=i&i-1;
count+=1;#count=count+1;
output.append(count);
return output;
Number of 1 Bits https://leetcode.com/problems/number-... Counting Bits https://leetcode.com/problems/countin... Code is given in the comment section. Python for beginners: https://www.youtube.com/watch?v=egq7Z...
Telegram: https://t.me/clcoding_python https://www.facebook.com/pirawenpython/
Number of 1 Bits https://leetcode.com/problems/number-... Counting Bits https://leetcode.com/problems/countin... Code is given in the comment section. Python for beginners: https://www.youtube.com/watch?v=egq7Z...
Telegram: https://t.me/clcoding_python https://www.facebook.com/pirawenpython/
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