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List of tables, db schema, dump etc using the Python sqlite3 API
...se.db')
table = pd.read_sql_query("SELECT * from table_name", db)
table.to_csv(table_name + '.csv', index_label='index')
Dump all tables:
import sqlite3
import pandas as pd
def to_csv():
db = sqlite3.connect('database.db')
cursor = db.cursor()
cursor.execute("SELECT name FROM sqlite...
How do I convert dates in a Pandas data frame to a 'date' data type?
...
I imagine a lot of data comes into Pandas from CSV files, in which case you can simply convert the date during the initial CSV read:
dfcsv = pd.read_csv('xyz.csv', parse_dates=[0]) where the 0 refers to the column the date is in.
You could also add , index_col=0 in there...
PostgreSQL query to return results as a comma separated list
...
You can generate a CSV from any SQL query using psql:
$ psql
> \o myfile.csv
> \f ','
> \a
> SELECT col1 AS column1, col2 AS column2 ... FROM ...
The resulting myfile.csv will have the SQL resultset column names as CSV column h...
Is Response.End() considered harmful?
...rmation on response.end so for other searches like myself who wish to post CSV/XML/PDF etc in response to an event without rendering the entire ASPX page, this is how I do it. (overriding the render methods is overly complex for such a simple task IMO)
// Add headers for a csv file or whatever
Resp...
Java: splitting a comma-separated string but ignoring commas in quotes
...
http://sourceforge.net/projects/javacsv/
https://github.com/pupi1985/JavaCSV-Reloaded
(fork of the previous library that will allow the generated output to have Windows line terminators \r\n when not running Windows)
http://opencsv.sourceforge.net/
CSV API f...
JavaScript: Create and save file [duplicate]
... files using just JavaScript. Here is an old example of mine of creating a CSV file. The user will be prompted to download it. This, unfortunately, does not work well in other browsers, especially IE.
<!DOCTYPE html>
<html>
<head>
<title>JS CSV</title>
</head>...
LINGO使用指南 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...出函数
输入和输出函数可以把模型和外部数据比如文本文件、数据库和电子表格等连接起来。
1．@file函数
该函数用从外部文件中输入数据，可以放在模型中任何地方。该函数的语法格式为@file(’filename’)。这里filena...
ValueError : I/O operation on closed file
...ent correctly; your for statement should be inside the with block:
import csv
with open('v.csv', 'w') as csvfile:
cwriter = csv.writer(csvfile, delimiter=' ', quotechar='|', quoting=csv.QUOTE_MINIMAL)
for w, c in p.items():
cwriter.writerow(w + c)
Outside the with block, the...
Attach a file from MemoryStream to a MailMessage in C#
...mplified snippet for sending an in-memory string as an email attachment (a CSV file in this particular case).
using (var stream = new MemoryStream())
using (var writer = new StreamWriter(stream)) // using UTF-8 encoding by default
using (var mailClient = new SmtpClient("localhost", 25))
using (...
Script to get the HTTP status code of a list of urls?
..._connect};%{size_download};%{speed_download}\n' < url.lst | tee results.csv
It just outputs a bunch of data into a csv file that can be imported into any office tool.
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