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Thread: Need to fix my brain on classes
Post: Need to fix my brain on classes
| I want to do a simple calendar to learn practical use of classes, because I find classes counterintuitive in python and I struggle a lot with it.
my code rn looks like this:
from dataclasses import d... |
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blackknite |
General Coding Help |
2 |
1,225 |
Apr-29-2022, 03:36 PM |
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Thread: How to understand the byte notation in python3
Post: RE: How to understand the byte notation in python3
| Okay, thank you for your answer.
You have made it very clear but this points me to another issue - How I am supposed to know if some byte is a part of another one? It looks tricky:
In [75]: bstr = b... |
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blackknite |
General Coding Help |
3 |
2,912 |
Feb-23-2021, 02:24 PM |
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Thread: How to understand the byte notation in python3
Post: How to understand the byte notation in python3
| Hey, I am trying to learn low-level stuff in py3 for some crypto project, and it is pretty hard so far.
In [63]: int(b'\x12AY5'.hex(),16)
Out[63]: 306272565 #Value of some weird byte
In [64]: int('... |
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blackknite |
General Coding Help |
3 |
2,912 |
Feb-23-2021, 07:00 AM |
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Thread: Need to speed up my code.
Post: RE: Need to speed up my code.
| Hey. Sorry for my response time.
So the oneliner using collections.Counter seems to be fastest, but I cant understand why and how.
My fastest solution for this, without importing any external modules... |
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blackknite |
Code Review |
6 |
3,881 |
Jan-19-2020, 01:24 AM |
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Thread: Need to speed up my code.
Post: Need to speed up my code.
| I have to return a simple sum of the most present values in the array, ie [3,5,2,1,2,3,2,2] - > should return 4, because (2,2,2,2).
The array sometimes is crazy focking big, and I cannot pass the e... |
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blackknite |
Code Review |
6 |
3,881 |
Jan-14-2020, 05:04 PM |
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Thread: I dont understand bytes in python.
Post: RE: I dont understand bytes in python.
| Thx for replying!
Okay, now its a whole lot clearer. Yet I still may have few small questions:
-How to properly concat two hex strings?
-When to use '0x80' and when 'x80'? In example - 'hex(112)' s... |
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blackknite |
General Coding Help |
3 |
4,014 |
Oct-02-2019, 12:46 AM |
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Thread: I dont understand bytes in python.
Post: I dont understand bytes in python.
| Everything is so confusing here, ie:
>>> z = b'\x93\x39\x02\x49\x83\x02\x82\xf3\x23\xf8\xd3\x13'
>>> list(z)
[147, 57, 2, 73, 131, 2, 130, 243, 35, 248, 211, 19]So what EXACTLY is th... |
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blackknite |
General Coding Help |
3 |
4,014 |
Oct-01-2019, 10:20 PM |
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Thread: My dict is not good
Post: RE: My dict is not good
| (Sep-23-2019, 10:01 AM)wavic Wrote: Did you see the code in my previous post?
Yeah, page wasnt refreshed or I just overlooked it. It works. thank you. |
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blackknite |
General Coding Help |
9 |
3,634 |
Sep-23-2019, 10:44 AM |
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Thread: My dict is not good
Post: RE: My dict is not good
| I just want to have a dict with words as keys, and summed ascii value of all letters in that word as values, I dont know if I can say it any clearer.
Maybe dont even look at code from my second post ... |
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blackknite |
General Coding Help |
9 |
3,634 |
Sep-23-2019, 09:29 AM |
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Thread: My dict is not good
Post: RE: My dict is not good
| Hey. Thx for replying!
The file with name "coded" contains permutations of a second file "words", and some random alphanumeric strings that I have to filter.
Its like 'blablah<EOL>', and EOL is... |
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blackknite |
General Coding Help |
9 |
3,634 |
Sep-22-2019, 03:22 PM |
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Thread: My dict is not good
Post: My dict is not good
| I want to create a dict from txt file, with words & summed ascii value but once again I have been defeated.
I guess I have never really understood dicts, in Python they arent intuitive at all and ... |
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blackknite |
General Coding Help |
9 |
3,634 |
Sep-22-2019, 02:03 PM |
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Thread: Using function argument in lists comprehension.
Post: RE: Using function argument in lists comprehension...
| It should count all the paremeter given digits in the string and Im still doing something wrong somehow.
def nb_dig(n,d):
r = [n**2 for n in range(1,n)]
digz = [r.count(d)]
print(r,digz)
... |
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blackknite |
General Coding Help |
5 |
3,054 |
Apr-23-2019, 09:05 PM |
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Thread: Using function argument in lists comprehension.
Post: Using function argument in lists comprehension.
| def nb_dig(n,d):
r = [n**2 for n in range(1,n)]
digz = [d for d in r]
print(r,digz)
nb_dig(10,1)Output:>>>[1, 4, 9, 16, 25, 36, 49, 64, 81] [1, 4, 9, 16, 25, 36, 49, 64, 81]So, I ... |
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blackknite |
General Coding Help |
5 |
3,054 |
Apr-23-2019, 07:29 PM |
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Thread: Hard time with prime factors in the task.
Post: Hard time with prime factors in the task.
| Hey people.Im trying to do some harder python challenges to learn some new things. Given a string,and a number, I have to get an ascii value of a char, get the largest prime factor of the number and a... |
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blackknite |
General Coding Help |
1 |
1,842 |
Jan-23-2019, 07:51 AM |
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Thread: FTP file size
Post: RE: FTP file size
| Locally I prefer:
>>> import os
>>> s = os.path.getsize("C:/WinPEpge.sys")
>>> s
536870912
But idk about your FTP, you gave no intel on what libs and soft are you using th... |
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blackknite |
General Coding Help |
2 |
4,983 |
Jan-23-2019, 07:31 AM |
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Thread: ' | ' Operator and 'OR'
Post: RE: ' | ' Operator and 'OR'
| (Jan-11-2019, 05:51 AM)nilamo Wrote: Those are not the same thing. If you add the "==0" check to the bitwise operation, you'd also have failures. ie: this should fail: is_divisible = lambda n,x,y:... |
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blackknite |
General Coding Help |
10 |
4,700 |
Jan-11-2019, 09:32 PM |
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Thread: ' | ' Operator and 'OR'
Post: RE: ' | ' Operator and 'OR'
| Thank you all for replying guys. To be more precise I have to say that version with '==0' (after first expression) and without it both works the same.
is_divisible = lambda n,x,y : n % x | n % y == 0
... |
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blackknite |
General Coding Help |
10 |
4,700 |
Jan-10-2019, 11:08 PM |
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Thread: ' | ' Operator and 'OR'
Post: RE: ' | ' Operator and 'OR'
| Thx for replying!
Why its incomplete? If 'n % x' is not ==0 then returns 1 which is equal to True, otherwise its False, works for me in Python3.
Im still trying to figure out how exactly this 'binary... |
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blackknite |
General Coding Help |
10 |
4,700 |
Jan-10-2019, 04:47 PM |
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Thread: ' | ' Operator and 'OR'
Post: ' | ' Operator and 'OR'
| Hey folks. Im doing some online challanges, and I got some things that gets me confused a bit, could use some explanation!
The first one is this, I dont know what I did and why this even works?
is_d... |
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blackknite |
General Coding Help |
10 |
4,700 |
Jan-10-2019, 01:10 AM |
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Thread: First non-repeating char and some errors.
Post: First non-repeating char and some errors.
| Hey, I do some coding challenges online and I have issue with this one.
At first I did this:
>>> q = lambda s:['' if not s else c for c in s if s.count(c)<=1][0]
>>> q('~><... |
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blackknite |
General Coding Help |
1 |
2,275 |
Jan-06-2019, 01:36 PM |
