Tagged Questions
0
votes
1answer
25 views
Python won't rewrite file with first line removed using readlines() and for loop
I' writing a web scraping script in Python that pulls an 'ID' from the first line of a text file and appends it to a partial URL; then downloads an image from said URL. Everything works fine, but when ...
0
votes
3answers
40 views
Convert string to int value python
I want to convert a string to a specific int value in Python i.e. "red" I want to be 1, "blue" to 2, etc. I am currently using if-else statements. I have a dataset of strings with common strings that ...
0
votes
4answers
33 views
Printing list into fixed width strings in Python
With the following list"
In [3]: entr = [ 'ATOM', '1', 'P', 'C', 'B', '3', '42.564', '-34.232', '-7.330', '1.00', '105.08', 'P' ]
I'd like to create a string with fixed width using %. But why this ...
0
votes
5answers
29 views
Python: how to escape “%s”
I'm trying to make a string that includes a "%s" with no formatting
For example, I want this:
#I want to make mystring = "x %s"
first_value = "x"
mystring = "%s %s" % first_value
So, I want to ...
0
votes
1answer
23 views
Python hex string operation: need to preserve the leading zeros
I have two numbers:
a = "00000108"
b = "FFFFF9FF"
I want to compute the bitwise AND of the hex values in the two strings. The result I want is a string:
"00000108"
Here is what I have come up ...
0
votes
1answer
19 views
How to use string kernels in scikit-learn?
I am trying to generate a string kernel that feeds a support vector classifier. I tried it with a function that calculates the kernel, something like that
def stringkernel(K, G):
for a in ...
2
votes
5answers
35 views
Using max() on a list that contains numbers and strings
I have a list that is like this:
self.thislist = ['Name', 13, 'Name1', 160, 'Name2', 394]
Basically the list has a name and a number after it, and I'm trying to find out the highest number in the ...
-1
votes
1answer
37 views
Python ANY operator comparing strings
Question
I am writing a program that should scrape HTML and search if any strings are in the url's i just downloaded. How can i achieve this? My Any Operator only seems to catch on to the first ...
0
votes
1answer
39 views
Most efficient way to strip a % from u'96.9%' and return a float
Let's say I run a BeautifulSoup strainer and get some unicode back like u'96.9%' and I want only the numeric values (and the decimal) to get printed out to a file.
It seems pretty straightforward to ...
1
vote
2answers
48 views
Getting Python to return a list of strings randomly from a given string
import random
def create_code(characters):
return list(random.choice(characters)*4)
if __name__ == '__main__':
characters = 'ygobpr'
print create_code(characters)
# how do i get python ...
0
votes
3answers
27 views
Python searches CSV for string in one column, returns string from another column in the same row
I'm attempting to write a program in python that searches ~27,000 rows for each string in a list. Each string I am searching for is in one column, and has an 'id' value in another column that I would ...
0
votes
5answers
44 views
Python Program that gets stuck on the first number entered
This is my code so far.
word = input('Enter a word: ')
count = 0
vowels = ['a' , 'e' , 'i' ,'o' , 'u']
for char in word:
if char in vowels:
count += 1
while word != "":
print(word + ...
-2
votes
1answer
31 views
Python error: string index out of range
I try to update a game of n in a row. But when i try to update the array matrix i get the "string out of range error.
I made a while statement with ind < len(board_height).
What am I doing wrong ...
-5
votes
2answers
35 views
Beautiful way to wrap string with quotes in python [on hold]
I have two ways..
"'" + 'hello' + "'"
and
"'%s'" % 'hello'
But not beautiful, Do you have any idea ?
0
votes
1answer
17 views
extract all lines after new line with regex python
i have this string:
Packages:
Package [com.bizportal] (42662eb0):
userId=10086 gids=[3003]
pkg=Package{42c3b300 com.bizportal}
codePath=/data/app/com.bizportal-1.apk
...
-1
votes
5answers
60 views
Python Coding for Reversing Sentences
this is the code i am using so far.
translated = []
line = input('Line: ')
while line != '':
for word in line.split():
letters = list(word)
letters.reverse()
word = ''.join(letters)
...
1
vote
3answers
28 views
Replace a certain index of a string in python 3.0
I need to replace a character in a string but here is the catch, the string will be all underscores and I need to be able to replace the underscore that corresponds to the index of the word. For ...
1
vote
1answer
46 views
how to print the equal sign in python
I'm trying to print an equal sign (=) in Python, using this code:
num= int(raw_input('Please enter a number: '))
num2= int(raw_input('Please enter another number: '))
print '%s + %s' % (num, num2), ...
0
votes
3answers
50 views
Why keep on converting from string to list back and forth?
I have a text file containing all the students' names and other information of my programing course like this:
Smith, John [email protected] [email protected] Student
Lester, Moe [email protected] ...
0
votes
0answers
9 views
Does PyString_AS_STRING work different in Windows 64 bits vs 32 bits?
I have the following function:
void py_get_var( const char** var_name, int* found, char** resultado )
{
*found = 0;
PyObject * module = PyImport_AddModule("__main__");
PyObject * ...
0
votes
1answer
11 views
creating a representation of an object when no string to work with (python, django)
i'm using the django tutorial (which i've done earlier) to create a simple timesheet app and struggling to understand the str method. works fine for the Project class because i have string name, but ...
0
votes
1answer
35 views
python - take a string and dictionary and return an encrypted version of the string
encrypt the string with the dictionary so that it returns kjyyp
def encrypt(s,d)
d = { 'a' : 'm', 'b' : 'd', 'c' : 'l', 'd' : 'x', 'e' : 'j',
'f' : 't', 'g' : 'u', 'h' : 'k', 'i' : ...
1
vote
2answers
49 views
How to store a set of string space efficiently
Assume we have a set of string
{"abc","def","ghia"}
What is the space efficient way to store the string?
In addition, given an input string like "abc" or "abc1", I need find out whether "abc"(yes) ...
0
votes
1answer
29 views
Convert a string with list syntax into list(s)
I am trying to convert a string into lists. The structure of the string (of which I have a database full of them) is always that of n lists within a list. However, I have them in string format. ...
-1
votes
2answers
37 views
Python Program with Ending Error
I am currently using this code
word = input('Enter a word: ')
count = 0
vowels = ['a' , 'e' , 'i' ,'o' , 'u']
for char in word:
if char in vowels:
count += 1
if count == 1:
...
-1
votes
1answer
36 views
Find specific values in a text file and write these strings to a new file
How can I find specific value in file with text and write these lines to the file (not only strings to the file, but all lines where are these strings)?
I have something like this (but it finds only ...
-1
votes
3answers
80 views
How to remove duplicate element in list?
The assignment says: Write a Python program that reads in a sentence. The program converts the string (that the user input) to a list and prints the sentence as a list of string objects. The program ...
0
votes
5answers
85 views
Python - check if a letter is in a list
If a letter (string) is in a list,
find_letter(['o', ['hello', 'c', 'bye']),
return True, if not return False.
def find_letter(lst):
lst=['o','hello', 1]
n='o'
if not lst: ...
-2
votes
3answers
26 views
How to match keys in a list and find there intersecting values?
i have a dictionary with lists and my goal is to match a query list against the dictionary and for matched terms display there intersecting values. For example
dict= [(this, ['1']), (word, ['1', ...
0
votes
3answers
41 views
Compare a permutation to list of words - Python
I'm trying to compare the output of a permutation of a string to a txt with pretty much every word in the dictionary. The function itself is an anagram solver.
The function takes word as a parameter. ...
0
votes
1answer
27 views
Generator not working to split string by particular identifier . Python 2
So far I have found a way to yield the name, string, and extra string. It works for the second one but does not work for the first one? it's so weird because the formats are really similar. is it ...
0
votes
3answers
34 views
Replacing Certain Parts of a String Python
I can not seem to solve this. I have many different strings, and they are always different. I need to replace the ends of them though, but they are always different lengths. Here is a example of a ...
1
vote
3answers
23 views
iterate through list while looking for matching elements from a different list in python
I have a list of some random strings ex:
list_test = ["adam", "adam", "lori", "conrad", "lori", "adam"]
Then i also have two lists, one that i want to test for matches agains and one that will ...
-2
votes
0answers
17 views
Converting a list of mixed elements to a string in Python [duplicate]
I have tried different ways to convert a list of mixed elements in the form of
a = ['hello', '123456', 20, 5]
to a desired string
b = 'hello, 123456, 20, 5'
but so far haven't been able to.
-4
votes
0answers
40 views
How can I convert multiple strings to uppercase, separated by enter? [on hold]
Converting a string to uppercase isn't a problem for me, but I want to convert multiple strings to uppercase, separated through Enter and when the user writes 'stop' and hits Enter it should convert ...
-4
votes
1answer
50 views
How to replace strings in a string
I have a text string. I need to decode the text string i.e, replace every character in the string with its counterpart and then read the message. How do I achieve this?
For example:
g fmnc wms ...
2
votes
1answer
42 views
A smarter & faster way to convert numpy ndarray to string in python
I have my geographical coordinates of rectangles represented as numpy ndarray like this:
(each row corresponds to a rectangle and each column contains its lower left and upper right longitudes and ...
1
vote
2answers
24 views
Why does the Output for a MySQL Connecter Query return as a nested list item?
Why does this print into a list and not just as a string?
import mysql.connector
from mysql.connector import errorcode
config = {
'user': 'user',
'password': 'xxxxx',
'host': '127.0.0.1',
...
1
vote
5answers
41 views
operating with string, list & dictionaries
I have a list & a dictionary.
l = ['one', 'two', 'three', 'four']
d = {'aw.one' : '#aw.one', 'aw.two' : '#aw.two'}
Now, I have a string :
s = "this is one sentence"
I want to check if any ...
0
votes
1answer
30 views
Returning a string from a Python function
def God():
set_path()
find_files(path)
def set_path():
'''Sets file path to inputted directory'''
# Should path default to a certain directory if path is invalid?
# (it does ...
1
vote
2answers
36 views
float value in a string to int in Python
Why isn't it possible to directly convert a floating point number represented as a string in Python to an int variable?
For example,
>>> val=str(10.20)
>>> int(val)
Traceback (most ...
1
vote
3answers
32 views
Python regex delimiting a string
[Answered first part, please scroll for second question edit]
Currently coding a web scraper in python.
I have the following example string:
Columbus Blue Jackets at Buffalo Sabres - 10/09/2014
I ...
-3
votes
1answer
26 views
extracting data from formatted string (python)
I have a string like this:
(63, 166) - (576, 366)
I need to extract the values out so that I have:
x1 = 63
y1 = 166
x2 = 576
y2 = 366
I can easily use the split() function and save the results ...
-6
votes
1answer
31 views
List and strings [on hold]
how do i write a function in python that, given two parameters of which one is a string text and one is a list of strings, the function counts the occurrences of the strings contained in the list in ...
0
votes
2answers
32 views
Detecting whether a string contains non-letters
How can I write a function that detects whether a string has non-letter characters in it?
Something like:
def detection(a):
if !"qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASDFGHJKLZXCVBNM" in a:
...
0
votes
1answer
32 views
Script to remove all files from a text file
I am creating a script that will copy all files mentioned in a text file to some destination.
This is my script:
with open('names.txt') as f:
for line in f:
a = 'cp ' + line + ' ...
1
vote
3answers
36 views
Capitalization of each sentence in a string in Python 3
This should be easy but somehow I'm not quite getting it.
My assignment is:
Write a function sentenceCapitalizer that has one parameter of type string. The function returns a
copy of the ...
-2
votes
3answers
50 views
Count most frequent [on hold]
I want to count most frequent string that i have in a list, but the list that i am trying to access is the return output of another function. Is there a way that i can call the function with a list ...
0
votes
2answers
29 views
How to loop thru a json strings and convert them to datetime objects?
I have a json file with the following content, and I want to convert its string values to date time object:
["2014-01-20 00:01:31", "2014-01-20 00:01:51", "2014-01-20 00:02:12"]
I think I need to ...
2
votes
2answers
55 views
What does 'r' mean before a Regex pattern?
I found the following regex substitution example from the documentation for Regex. I'm a little bit confused as to what the prefix r does before the string?
...
