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How to make a function that lays mines to random squares on nested list?

The field is created like this:
field = []
for row in range(10):
field.append([])
for col in range(15):
field[-1].append(" ")
Tuples represent free squares where mines can be layed
free = []
for x in range(15):
for y in range(10):
free.append((x, y))
I have to lay the mines trough this function:
def lay_mines(field, free, number_of_mines):
for _ in number_of_mines:
mines = random.sample(free, number_of_mines)
field(mines) = ["x"]
I was thinking using random.sample() or random.choice(). I just can't get it to work. How can I place the string "x" to a certain random coordinate?

import random
def lay_mines(x, y, number_of_mines=0):
f = [list(' ' * x) for _ in range(y)]
for m in random.sample(range(x * y), k=number_of_mines): # random sampling without replacement
f[m % y][m // y] = 'X'
return f
field = lay_mines(15, 10, 20)
print(*field, sep='\n')
Prints:
['X', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ']
[' ', ' ', ' ', ' ', 'X', ' ', ' ', ' ', 'X', ' ', ' ', ' ', ' ', ' ', ' ']
[' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', 'X', ' ', ' ', ' ', ' ', ' ', ' ']
[' ', ' ', 'X', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ']
[' ', ' ', 'X', ' ', ' ', ' ', ' ', 'X', 'X', ' ', ' ', ' ', ' ', ' ', ' ']
[' ', ' ', ' ', ' ', ' ', ' ', 'X', ' ', ' ', ' ', ' ', 'X', ' ', ' ', ' ']
[' ', 'X', ' ', ' ', 'X', ' ', ' ', ' ', ' ', 'X', ' ', ' ', ' ', ' ', ' ']
[' ', ' ', 'X', 'X', 'X', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ']
[' ', ' ', ' ', ' ', ' ', 'X', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', 'X']
[' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', 'X', ' ', 'X', ' ', ' ', ' ', ' ']

Printing just the elements in a 2D list [closed]

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I am making a text based game and the map is a 2D list. The way i have been doing until now is like this:
self.map = [[" " for i in range(34)]
for i in range(40)] # initialize the 2d array
for layer in self.map: #print the array
print(layer)
However, this prints the commas and quote marks as well. Is there any way to print the array with just the elements in the list and the printed list should be in the same format as the text printed by the code above above.
EDIT
This is how i would like to print it, but without the speech marks and commas:
[' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ']
[' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ']
[' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ']
[' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ']
[' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ']
[' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ']
[' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ']
[' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ']
[' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ']
[' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ']
[' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ']
[' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ']
[' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ']
[' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ']
[' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ']
[' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ']
[' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ']
[' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ']
[' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ']
[' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ']
[' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ']
[' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ']
[' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ']
[' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ']
[' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ']
[' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ']
[' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ']
[' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ']
[' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ']

Use join to convert list to single string
self.map = [[" " for i in range(34)]
for i in range(40)] # initialize the 2d array
for layer in self.map: #print the array
print( "".join(layer) )

When you call print(layer) its printing a representation of that object which is an array of chars/strings.
To print the individual strings consecutively in lines you could use this code:
for layer in self.map: #iterate over the layers
for item in layer: #iterate over the items in the layer
print(item, end='') # the end='' prevents a line break
print('') #make a line break

For loop not working as intended

I am in the middle of my course work and I am now having trouble with one of my for loops.
def update():
update=[]
update1=[]
with open('Stock2.txt','r') as stockFile:
for eachLine in stockFile:
eachLine=eachLine.strip().split()
update.append(eachLine)
update.remove(update[0])
stockFile.close()
with open('Stock2.txt','r') as stockFile:
for eachLine in stockFile:
eachLine=eachLine.strip().split(' ')
update1.append(eachLine)
update1.remove(update1[0])
for eachList in update1:
loopCon=-1
for eachItem in eachList:
loopCon+=1
if eachItem=='':
eachList[loopCon]=' '
count=-1
for eachList in update1:
for eachItem in eachList:
count+=1
if eachItem != ' ':
print(count)
The last for loop that I have been working on is looping ok but when I add one to count every time it loops on the for loop 'for eachItem in eachList:' it comes up with random numbers as follows:
0 10 14 21 28 35 36 46 62 69 76 83 84 94 111
Here is the stock file I am using - Stock2.txt
GTIN-8 Product-Name Price(£) CSL ROL TSL
95820194 Windows-10-64bit 119.99 0 1 3
68196167 Cheese 1.00 0 3 8
62017014 Bread 0.93 0 3 9
86179616 10tb-memory-stick 916.96 0 0 4
19610577 Freddo 0.15 0 2 9
So on.
Is there anything I have done wrong whilst doing this as I probably would not be able to detect it that easily as I have only been doing python for almost 1 year.
Thank you for your time.

You increment count outside the if that prints. Try this instead:
for eachList in update1:
for eachItem in eachList:
if eachItem != ' ':
count+=1
print(count)

If I put a print update1 statement before your last for loop, i.e., before the statement for eachList in update1:, I get the following output:
[['95820194', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', 'Windows-10-64bit', ' ', ' ', ' ', '119.99', ' ', ' ', ' ', ' ', ' ', ' ', '0', ' ', ' ', ' ', ' ', ' ', ' ', '1', ' ', ' ', ' ', ' ', ' ', ' ', '3'], ['68196167', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', 'Cheese', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', '1.00', ' ', ' ', ' ', ' ', ' ', ' ', '0', ' ', ' ', ' ', ' ', ' ', ' ', '3', ' ', ' ', ' ', ' ', ' ', ' ', '8'], ['62017014', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', 'Bread', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', '0.93', ' ', ' ', ' ', ' ', ' ', ' ', '0', ' ', ' ', ' ', ' ', ' ', ' ', '3', ' ', ' ', ' ', ' ', ' ', ' ', '9'], ['86179616', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', '10tb-memory-stick', ' ', ' ', '916.96', ' ', ' ', ' ', ' ', ' ', ' ', '0', ' ', ' ', ' ', ' ', ' ', ' ', '0', ' ', ' ', ' ', ' ', ' ', ' ', '4'], ['19610577', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', 'Freddo', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', '0.15', ' ', ' ', ' ', ' ', ' ', ' ', '0', ' ', ' ', ' ', ' ', ' ', ' ', '2', ' ', ' ', ' ', ' ', ' ', ' ', '9']]
So by this it seems the output isnt random at all. What you are doing is traversing each list inside the list update1, and you are incrementing count each time you get an element in eachItem.
However you are printing count only when eachItem != ' '. So as you can see it prints 0 when eachItem == '95820194', and then it prints 10 when eachItem == 'Windows-10-64bit', and so on. Though it is incremented even when eachItem == ' ', just not printed.

Stemming csv files in Python

Okay, I have this code in Python in which it imports two csv files. The first csv file is named "claims" (one column, many rows) and the other one is named "sexualHarassment" (one column, many rows) The program right now checks all rows of "claims" to see if it contains any words from "sexualHarassment" and if it does, then it outputs that row into a new csv file named "output" It also eliminates certain stopwords that I chose. <-- This part of the program works.
Now I need to go through a stemming process to stem all of the words to take out tenses from the words. Such as "discriminated" to "discriminat", "harassed" to "harass" and so on..
I've downloaded and installed a couple stemming packages but I can only stem out words such as:
from nltk import PorterStemmer
PorterStemmer().stem_word('discriminated')
>>>discriminate
Is there anyway that I can run this stemming check for all words in each row of the "sexual harassment" file before it outputs it into the new csv file?
Here is a copy of my code:
import csv
with open("claims.csv") as file1, open("masterlist.csv") as file2,
open("stopwords.csv") as file3, open("output.csv", "wb+") as file4:
writer = csv.writer(file4)
key_words = [word.strip() for word in file2.readlines()]
stop_words = [' also ', ' although ', ' always ', ' and ', ' any ', ' are ', ' as ', ' at ',\
' around ', ' be ', ' by ', ' for ', ' from ', ' has ', ' on ', ' that ', ' were ', ' will ',\
' with ' ' can ', ' cannot ', ' if ', ' it ', ' the ', ' there ', ' which ', ' in ', ' is ',\
' its ', ' me ', ' of ', ' was ', ' then ', ' with ', ' a ', ' an ', ' to ', ' to ', ' when ',\
' however ', '"', ',', '.', '-', '?', '!', '(', ')']
for row in file1:
row = row.strip()
row = row.lower()
for stopword in stop_words:
if stopword in row:
row = row.replace(stopword," ")
for key in key_words:
if key in row:
writer.writerow([key, row])
break

Partitioning a string in Python by a regular expression

I need to split a string into an array on word boundaries (whitespace) while maintaining the whitespace.
For example:
'this is a\nsentence'
Would become
['this', ' ', 'is', ' ', 'a' '\n', 'sentence']
I know about str.partition and re.split, but neither of them quite do what I want and there is no re.partition.
How should I partition strings on whitespace in Python with reasonable efficiency?

Try this:
s = "this is a\nsentence"
re.split(r'(\W+)', s) # Notice parentheses and a plus sign.
Result would be:
['this', ' ', 'is', ' ', 'a', '\n', 'sentence']

Symbol of whitespace in re is '\s' not '\W'
Compare:
import re
s = "With a sign # written # the beginning , that's a\nsentence,"\
'\nno more an instruction!,\tyou know ?? "Cases" & and surprises:'\
"that will 'lways unknown **before**, in 81% of time$"
a = re.split('(\W+)', s)
print a
print len(a)
print
b = re.split('(\s+)', s)
print b
print len(b)
produces
['With', ' ', 'a', ' ', 'sign', ' # ', 'written', ' # ', 'the', ' ', 'beginning', ' , ', 'that', "'", 's', ' ', 'a', '\n', 'sentence', ',\n', 'no', ' ', 'more', ' ', 'an', ' ', 'instruction', '!,\t', 'you', ' ', 'know', ' ?? "', 'Cases', '" & ', 'and', ' ', 'surprises', ':', 'that', ' ', 'will', " '", 'lways', ' ', 'unknown', ' **', 'before', '**, ', 'in', ' ', '81', '% ', 'of', ' ', 'time', '$', '']
57
['With', ' ', 'a', ' ', 'sign', ' ', '#', ' ', 'written', ' ', '#', ' ', 'the', ' ', 'beginning', ' ', ',', ' ', "that's", ' ', 'a', '\n', 'sentence,', '\n', 'no', ' ', 'more', ' ', 'an', ' ', 'instruction!,', '\t', 'you', ' ', 'know', ' ', '??', ' ', '"Cases"', ' ', '&', ' ', 'and', ' ', 'surprises:that', ' ', 'will', ' ', "'lways", ' ', 'unknown', ' ', '**before**,', ' ', 'in', ' ', '81%', ' ', 'of', ' ', 'time$']
61

Try this:
re.split('(\W+)','this is a\nsentence')