How do I print a list in python to a file
Question
I have a list of data with multiple rows that I have read from an excel file I then read it in to a list. Now, I would like to print this list to another text file and save it and then print out html to another file. Then I would like to make a html file so I can make a table so that it has 4 rows and each row would contain one cell of data.
Note: I am using python 3.
I have tried this so far but it does not seem to work.
data = ['Course name', 'Course Type', 'Tutor']
['English', , 'Languages' , 'Mr A']
['Geography' , 'Humanities', 'Mr B']
['Civil Engineering' , 'Engineering', 'Mr C']
f = open("SomeData.csv", 'w')
for row in mylist:
print(row,file=f)
3 answers
solution1
3 2012-11-25 16:27:05
Your code list initialization translates to:
data = ['Course name', 'Course Type', 'Tutor']
['English', , 'Languages' , 'Mr A'] # Just a statement
['Geography' , 'Humanities', 'Mr B'] # Just a statement
['Civil Engineering' , 'Engineering', 'Mr C'] # Just a statement
but you need to make a list of lists:
data = [
['Course name', 'Course Type', 'Tutor'],
['English', 'Languages' , 'Mr A'],
['Geography', 'Humanities', 'Mr B'],
['Civil Engineering', 'Engineering', 'Mr C']
]
Next, you can write your data to file:
f = open("output.txt", "w")
for row in data:
print(", ".join(row), file=f)
f.close()
solution2
2 2012-11-25 16:58:46
Once you get your list correctly assembled as noted in the above answer, you can do the output part as mentioned, or like this:
f = open("SomeData.csv", 'w')
for row in data:
f.write(",".join(row)+",")
f.close()
Here is a hint on an easy way to do the HTML output portion in the same manner as the CSV portion.
f = open("output.html", 'w')
f.write("<html><table>")
for row in data:
f.write("<tr><td>"+"</td><td>".join(row)+"</td></tr>")
f.write("</table></html>")
f.close()
There is also a python csv library that helps with more in-depth CSV needs: http://docs.python.org/3.3/library/csv.html
solution3
1 2012-11-25 18:55:46
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
import csv
class CoolFileWriter:
"""reads a csv file and writes a text or html file"""
def __init__(self, csv_file, txt_out='out.txt', html_out='out.html'):
self.csv_file = csv_file
self.txt_out = txt_out
self.html_out = html_out
self.content = []
def read_csv(self):
with open(self.csv_file, newline='') as f:
reader = csv.reader(f)
for row in reader:
self.content.append(row)
def write_txt(self):
f = open(self.txt_out, 'w')
for row in self.content:
f.write(', '.join(row) + '\n')
f.close()
def write_html(self):
html_pre="""
<!DOCTYPE HTML>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Table Data</title>
<style>
#newspaper-a
{
font-family: "Lucida Sans Unicode", "Lucida Grande", Sans-Serif;
font-size: 12px;
margin: 45px;
width: 480px;
text-align: left;
border-collapse: collapse;
border: 1px solid #69c;
}
#newspaper-a th
{
padding: 12px 17px 12px 17px;
font-weight: normal;
font-size: 14px;
color: #039;
border-bottom: 1px dashed #69c;
}
#newspaper-a td
{
padding: 7px 17px 7px 17px;
color: #669;
}
</style>
</head>
<body>
<table id="newspaper-a">
"""
html_post="""
</table>
</body>
</html>
"""
f = open(self.html_out, 'w')
f.write(html_pre)
th=True
for row in self.content:
if (th):
f.write("<tr>\n\t<th>"+"</th>\n\t<th>".join(row)+"</th>\n</tr>\n")
th=False
else:
f.write("<tr>\n\t<td>"+"</td>\n\t<td>".join(row)+"</td>\n</tr>\n")
f.write(html_post)
f.close()
f = CoolFileWriter('excel.csv', 'data.txt', 'data.html')
f.read_csv()
f.write_txt()
f.write_html()
The table style comes from here . :-)
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