Here i just tested if it wanted to save in two different ways,
but its not working the file is nowhere to be found on my pc
import csv
def writecsv(data):
with open('CT_10-10-1.csv', 'a') as csvFile:
writer = csv.writer(csvFile)
writer.writerow(data)
csvFile.close()
def write(data):
csvFile = open('CT_10-10-1.csv', 'a')
writer = csv.writer(csvFile)
writer.writerow(data)
#writecsv('10')
write('10')
I want to read csv file containing different names and merge two names into one.
for example:
google.com , facebook.com
should generate something like
googleface.com or googlebook.com
import csv
from nltk.stem import PorterStemmer
from nltk.tokenize import word_tokenize
ps = PorterStemmer()
with open('C:/Users/upadh/Desktop/domains.txt', 'r') as csvFile:
csvReader = csv.DictReader(csvFile, delimiter=',')
string ={}
count =0
for row in csvReader:
# for row in csvReader:
#if row is 0 :
for header, value in row.items():
try:
string[header].append(value)
except KeyError:
string[header] = [value]
for w in sorted(str(string)):
print(w, " : ", ps.stem(w))
Extract names can be done like this:
import csv
with open('inputCSV.txt', 'r') as csvFile:
csvReader = csv.reader(csvFile, delimiter=',')
for line in csvReader:
#prints all 'names' in the csv file, here you can add code to do whatever.
[print(name) for name in line]
import csv
with open('dataDusta.csv','r') as csv_file:
csv_reader = csv.reader(csv_file)
with open('new_dataDusta.csv','w') as new_file:
csv_writer = csv.writer(new_file, delimiter = ",")
for line in csv_reader:
csv_writer.writerow(line)
All of your operations on new_file must be within the with open(... that you opened it with. This includes using csv_writer, which is itself using new_file.
So, I've got a CSV file (league.csv') in my directory that I want to access through Python.
When I do this:
with open('league.csv', 'r') as csvFile:
csvReader = csv.reader(csvFile)
next(csvReader)
for line in csvReader:
print(line[0])
It works great. But when I try to make it into a function it doesn't work:
def createLeague(csv):
with open(csv, 'r') as csvFile:
csvReader = csv.reader(csvFile)
next(csvReader)
for line in csvReader:
print(line[0])
return
If I call this using:
createLeague('league.csv')
I get the error
csvReader = csv.reader(csvFile)
AttributeError: 'str' object has no attribute 'reader'
This makes no sense because type(csvFile) is not str, and I'm doing exactly the same as above?
Could someone help me, I'm getting really frustrated!
Thanks!
See inline comment what goes wrong.
import csv # "csv" variable at "with open..." overwrites
# cvs module.
from csv import reader # required to use the function "reader" from csv.
def createLeague(csv): # "csv" variable overwrites cvs module.
with open(csv, 'r') as csvFile:
csvReader = reader(csvFile) # skip the csv. here and it works for you.
next(csvReader)
for line in csvReader:
print(line[0])
return
Alternatively:
Below example with changed csv filename does not overwrite the csv module that you just have loaded. The mix-up triggers the error to occur.
import csv
#from csv import reader
def createLeague(csv_file):
with open(csv_file, 'r') as csvFile: # changed variable "csv" filename.
csvReader = csv.reader(csvFile)
next(csvReader)
for line in csvReader:
print(line[0])
return
Don’t use the name of the library as the name of the variable in the function definition.
I have data which is being accessed via http request and is sent back by the server in a comma separated format, I have the following code :
site= 'www.example.com'
hdr = {'User-Agent': 'Mozilla/5.0'}
req = urllib2.Request(site,headers=hdr)
page = urllib2.urlopen(req)
soup = BeautifulSoup(page)
soup = soup.get_text()
text=str(soup)
The content of text is as follows:
april,2,5,7
may,3,5,8
june,4,7,3
july,5,6,9
How can I save this data into a CSV file.
I know I can do something along the lines of the following to iterate line by line:
import StringIO
s = StringIO.StringIO(text)
for line in s:
But i'm unsure how to now properly write each line to CSV
EDIT---> Thanks for the feedback as suggested the solution was rather simple and can be seen below.
Solution:
import StringIO
s = StringIO.StringIO(text)
with open('fileName.csv', 'w') as f:
for line in s:
f.write(line)
General way:
##text=List of strings to be written to file
with open('csvfile.csv','wb') as file:
for line in text:
file.write(line)
file.write('\n')
OR
Using CSV writer :
import csv
with open(<path to output_csv>, "wb") as csv_file:
writer = csv.writer(csv_file, delimiter=',')
for line in data:
writer.writerow(line)
OR
Simplest way:
f = open('csvfile.csv','w')
f.write('hi there\n') #Give your csv text here.
## Python will convert \n to os.linesep
f.close()
You could just write to the file as you would write any normal file.
with open('csvfile.csv','wb') as file:
for l in text:
file.write(l)
file.write('\n')
If just in case, it is a list of lists, you could directly use built-in csv module
import csv
with open("csvfile.csv", "wb") as file:
writer = csv.writer(file)
writer.writerows(text)
I would simply write each line to a file, since it's already in a CSV format:
write_file = "output.csv"
with open(write_file, "wt", encoding="utf-8") as output:
for line in text:
output.write(line + '\n')
I can't recall how to write lines with line-breaks at the moment, though :p
Also, you might like to take a look at this answer about write(), writelines(), and '\n'.
To complement the previous answers, I whipped up a quick class to write to CSV files. It makes it easier to manage and close open files and achieve consistency and cleaner code if you have to deal with multiple files.
class CSVWriter():
filename = None
fp = None
writer = None
def __init__(self, filename):
self.filename = filename
self.fp = open(self.filename, 'w', encoding='utf8')
self.writer = csv.writer(self.fp, delimiter=';', quotechar='"', quoting=csv.QUOTE_ALL, lineterminator='\n')
def close(self):
self.fp.close()
def write(self, elems):
self.writer.writerow(elems)
def size(self):
return os.path.getsize(self.filename)
def fname(self):
return self.filename
Example usage:
mycsv = CSVWriter('/tmp/test.csv')
mycsv.write((12,'green','apples'))
mycsv.write((7,'yellow','bananas'))
mycsv.close()
print("Written %d bytes to %s" % (mycsv.size(), mycsv.fname()))
Have fun
What about this:
with open("your_csv_file.csv", "w") as f:
f.write("\n".join(text))
str.join() Return a string which is the concatenation of the strings in iterable.
The separator between elements is
the string providing this method.
In my situation...
with open('UPRN.csv', 'w', newline='') as out_file:
writer = csv.writer(out_file)
writer.writerow(('Name', 'UPRN','ADMIN_AREA','TOWN','STREET','NAME_NUMBER'))
writer.writerows(lines)
you need to include the newline option in the open attribute and it will work
https://www.programiz.com/python-programming/writing-csv-files