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public by lbottaro 303328 31 7 0
How to read and parse a txt file in python
This code shows how to read a txt file and parse the data
import os
import sys
myfile = open('/some/path/to/file.txt', "r")
# EXAMPLE OF FILE FORMAT:
# abc 123 234 456 678
# def 122223 2333334 454446 611178
# ghi 144423 211134 44456 61114478
for line in myfile.readlines():
name= ''
numList = list()
print line
try:
name = line.split()[0] # it will get 'abc'/'def'/'ghi'
numList = line.split()[1:] # it will get all other stuff inline...
except:
print "Invalid file format"
myfile.close()
sys.exit(1)
if not numList:
print("Invalid numList format! name= " + str(name))
myfile.close()
sys.exit(1)
print 'name='+str(name)
print 'numList='+str(numList)
myfile.close()public by lbottaro 4551 5 7 5
How to sort a Javascript array parsing elements using regex pattern
The Javascript Array.sort() method accepts a callback function to compare two elements of the array using a specific logic.
The callback function below may help you in sorting an array matching a particular regular expression pattern.
The format of elements in array is x/y/z, where x, y and z are integers, eg "5/10/2".
I need to sort the eleme
var myCompare = function(a,b) {
var matchPattern_A = /^([0-9]+)\/([0-9]+)\/([0-9]+)$/g.exec(a);
var matchPattern_B = /^([0-9]+)\/([0-9]+)\/([0-9]+)$/g.exec(b);
if(matchPattern_A && matchPattern_B)
{
//Apply regex sort
//I need to sort based on match[1], match[2], match[3]
console.log('Apply regex sort');
if (parseInt(matchPattern_A[1], 10) < parseInt(matchPattern_B[1], 10))
return -1;
if (parseInt(matchPattern_A[1], 10) > parseInt(matchPattern_B[1], 10))
return 1;
else {
if (parseInt(matchPattern_A[2], 10) < parseInt(matchPattern_B[2], 10))
return -1;
if (parseInt(matchPattern_A[2], 10) > parseInt(matchPattern_B[2], 10))
return 1;
else {
if (parseInt(matchPattern_A[3], 10) < parseInt(matchPattern_B[3], 10))
return -1;
if (parseInt(matchPattern_A[3], 10) > parseInt(matchPattern_B[3], 10))
return 1;
return 0;
}
}
}
else {
//Apply basic lexicographic sort
console.log('Apply basic lexicographic sort');
if (a < b)
return -1;
if (a > b)
return 1;
return 0;
}
};
var myArr = [ '5/4/30', '5/10/2', '5/4/3', '1/3/8'];
console.log(myArr);
myArr.sort(this.myCompare);
console.log(myArr);
/* Example,
having an array as
['5/4/30', '5/10/2', '5/4/3', '1/3/8']
it will be sorted as
['1/3/8', '5/4/3', '5/4/30', '5/10/2']
*/ public by lbottaro 3447 2 7 1
Regular Expression In Python - Simple Grouping
This python code shows how to define a regular expression path and have it applied to some string.
The regex is defined using the compile built-in method of re library.
In the following example some groups are used to parse information from filename strings listed by 'ls' linux command.
Exception will raise if no match will be found.
import os, re
# Assume to have some file names listed
# The matching path is: <id>_<name>_<code>.txt
# Define regex
my_regExp = re.compile(r'(?P<id>^[^_]*)_(?P<name>[^.]*)_(?P<code>[^.]*).txt')
for myFile in os.popen('ls -F /some/path').readlines():
id= ''
name= ''
code= ''
try:
id= my_regExp.match(myFile).group('id')
except:
msgErr='Error on id - ' + myFile
try:
name= my_regExp.match(myFile).group('name')
except:
msgErr='Error on name - ' + myFile
try:
code= my_regExp.match(myFile).group('code')
except:
msgErr='Error on code- ' + myFile
public by lbottaro 2743 2 6 1
Parsing and finding symbolic links in multiple paths
This bash script will list simbolic links in multiple path (using wildchar * for nested directories), at level 1 from main directory, parsing the result as well.
The script will use awk to parse returned data, getting the 11th data, space separated.
ls -l `find ABC*/code/target-*/TARGET -maxdepth 1 -type l -name "*"` | awk '{print $11}'
public by ejmurray 2466 0 3 -1
cahpter12 for dice into python and XML parsing
cahpter12 for dice into python and XML parsing:
xml_01.xml
<?xml version='1.0' encoding='utf-8'?>
<feed>
<title>dive into mark</title>
<subtitle>currently between addictions</subtitle>
<id>tag:diveintomark.org,2001?07?29:/</id>
<updated>2009?03?27T21:56:07Z</updated>
<link rel='alternate' type='text/html' href='http://diveintomark.org/'/>
<link rel='self' type='application/atom+xml' href='http://diveintomark.org/feed/'/>
<entry>
<author>
<name>Mark</name>
<uri>http://diveintomark.org/</uri>
</author>
<title>Dive into history, 2009 edition</title>
<link rel='alternate' type='text/html'
href='http://diveintomark.org/archives/2009/03/27/dive?into?history?2009?edition'/>
<id>tag:diveintomark.org,2009?03?27:/archives/20090327172042</id>
<updated>2009?03?27T21:56:07Z</updated>
<published>2009?03?27T17:20:42Z</published>
<category scheme='http://diveintomark.org' term='diveintopython'/>
<category scheme='http://diveintomark.org' term='docbook'/>
<category scheme='http://diveintomark.org' term='html'/>
<summary type='html'>Putting an entire chapter on one page sounds
bloated, but consider this & my longest chapter so far
would be 75 printed pages, and it loads in under 5 seconds&hellip;
On dialup.</summary>
</entry>
<entry>
<author>
<name>Mark</name>
<uri>http://diveintomark.org/</uri>
</author>
<title>Accessibility is a harsh mistress</title>
<link> rel='alternate' type='text/html'
href='http://diveintomark.org/archives/2009/03/21/accessibility‐is‐a‐harsh‐mistress'</link>
<id>tag:diveintomark.org,2009‐03‐21:/archives/20090321200928</id>
<updated>2009‐03‐22T01:05:37Z</updated>
<published>2009‐03‐21T20:09:28Z</published>
<category> scheme='http://diveintomark.org' term='accessibility'</category>
<summary> type='html'>The accessibility orthodoxy does not permit people to question the value of features that are rarely useful and rarely used.</summary>
</entry>
<entry>
<author>
<name>Mark</name>
</author>
<title>A gentle introduction to video encoding, part 1: container formats</title>
<link> rel='alternate' type='text/html'
href='http://diveintomark.org/archives/2008/12/18/give‐part‐1‐container‐formats'</link>
<id>tag:diveintomark.org,2008‐12‐18:/archives/20081218155422</id>
<updated>2009‐01‐11T19:39:22Z</updated>
<published>2008‐12‐18T15:54:22Z</published>
<category> scheme='http://diveintomark.org' term='asf'</category>
<category> scheme='http://diveintomark.org' term='avi'</category>
<category> scheme='http://diveintomark.org' term='encoding'</category>
<category> scheme='http://diveintomark.org' term='flv'</category>
<category> scheme='http://diveintomark.org' term='GIVE'</category>
<category> scheme='http://diveintomark.org' term='mp4'</category>
<category> scheme='http://diveintomark.org' term='ogg'</category>
<category> scheme='http://diveintomark.org' term='video'</category>
<summary> type='html'>These notes will eventually become part of a tech talk on video encoding.</summary>
</entry>
</feed>
public by lbottaro 4406 1 7 0
How to fetch Internet Resources Using urllib2 in python
urllib2 is a Python module for fetching URLs (Uniform Resource Locators).
It offers a simple interface, based on the urlopen function.
This method is capable of fetching URLs using a variety of different protocols.
In this example you can see a specific exception handlers for HTTPError and URLError.
import os, urllib2
def getURLResult():
try:
intRes = urllib2.urlopen("http://your_URL")
except urllib2.HTTPError, e:
print "HTTPError Error: " + str(e.code)
except urllib2.URLError, e:
print "URLError Error: " + str(e.reason)
print "ok"public by mralexgray 2062 0 3 0
Canonical shell argument parsing.
Canonical shell argument parsing.:
argparse.zsh
#!/usr/bin/env zsh
# Print usage information if there are no arguments on the command line.
[ "$#" = "0" ] &&
echo 'Usage: via-ssh.sh [ -v ] [ -d ] [USER@]SERVER[:PORT]' && exit 1
# Process the command line parameters.
while [ "$#" != '0' ] ; do
case "$1" in
-v) VERBOSE=1 ; shift ;;
-d) DNS=1 ; shift ;;
*) SSH_PORT=${1##*:}
SSH_USER_SERVER=${1%%:*}
[ "$SSH_USER_SERVER" = "$SSH_PORT" ] && SSH_PORT=22
shift ;;
esac
done
#!/bin/bash
usage()
{
echo ""
echo "$0 -f <csv|html> -i <IP address> -l"
echo ""
echo "Example:"
echo " $0 -f html -i 172.16.88.83"
echo " $0 -f csv -i 172.16.88.83 -l"
}
#default value
FORMAT="csv"
IPADDR=""
LOAD=false
while getopts ":f:i:l" optname
do
case "$optname" in
"f")
if [[ ${OPTARG} == "csv" || ${OPTARG} == "html" ]] ; then
FORMAT="${OPTARG}"
else
echo "Output format not supported"
usage
exit 1
fi
;;
"i")
IPADDR="${OPTARG}"
;;
"l")
LOAD=true
;;
"?")
usage
exit 1
;;
":")
echo "No argument value for option $OPTARG"
;;
*)
echo "Unknown error while processing options"
;;
esac
done
# Mandatory arguments
if [[ -z ${FORMAT} ]] || [[ -z ${IPADDR} ]]
then
usage
exit 1
fi
echo "format: $FORMAT"
echo "ipaddr: $IPADDR"
if [[ ${LOAD} == "true" ]] ; then
echo "load: true"
else
echo "load: false"
fi
String response = event.getJsonLibraryMetadata();
JsonFactory jf = new JsonFactory();
try {
// Log.i("JSON", response);
JsonParser jp = jf.createParser(response);
while (jp.nextToken() != JsonToken.END_OBJECT) {
String token = jp.getCurrentName();
if ("ebooks".equals(token)) {
// System.out.println("ebooks :");
EBookDetails mEBookDetails = new EBookDetails();
// the next token will be '[' that means that we have an
// array
jp.nextToken();
// parse tokens until you find ']'
while (jp.nextToken() != JsonToken.END_ARRAY) {
// System.out.println(jp.getText());
String currentToken = jp.getCurrentName();
if ("cover_thumbnail".equals(currentToken)) {
jp.nextToken();
}
if ("scriptures".equals(currentToken)) {
jp.nextToken();
}
if ("sample".equals(currentToken)) {
jp.nextToken();
}
if ("created_at".equals(currentToken)) {
jp.nextToken();
}
if ("updated_at".equals(currentToken)) {
jp.nextToken();
}
if ("id".equals(currentToken)) {
jp.nextToken();
mEBookDetails.id = jp.getIntValue();// ("id");
}
if ("archived".equals(currentToken)) {
jp.nextToken();
mEBookDetails.isArchived = jp.getValueAsBoolean();
// .getBoolean("archived");
}
if ("title".equals(currentToken)) {
jp.nextToken();
mEBookDetails.title = jp.getValueAsString();// getString("title");
products.add(mEBookDetails.title);
}
if ("description".equals(currentToken)) {
jp.nextToken();
mEBookDetails.description = jp.getValueAsString();
// .getString("description");
}
if ("author".equals(currentToken)) {
jp.nextToken();
mEBookDetails.author = jp.getValueAsString();// .getString("author");
}
if ("file_name".equals(currentToken)) {
jp.nextToken();
mEBookDetails.file_name = jp.getValueAsString();// .getString("file_name");
}
if ("genres".equals(currentToken)) {
jp.skipChildren();
// while (jp.nextToken() != JsonToken.END_ARRAY) {
//
// }
}
if ("authors".equals(currentToken)) {
jp.skipChildren();
// while (jp.nextToken() != JsonToken.END_ARRAY) {
//
// }
}
if ("topics".equals(currentToken)) {
jp.skipChildren();
// while (jp.nextToken() != JsonToken.END_ARRAY) {
// }
}
if ("cover_url".equals(currentToken)) {
jp.nextToken();
mEBookDetails.cover_url = jp.getValueAsString();// .getString("cover_url");
// XXX- Stancho - speed optimization
String key = "B" + mEBookDetails.id;
// XXX- Stancho - speed optimization -
// reduce the number of String adding
app.book_list.put(key, mEBookDetails);
mEBookDetails = new EBookDetails();
}
}
}
}
jp.close();public by msdn 147930 0 7 0
Parse: Parses the hard disk SettingData embedded instance returned from the server and creates a new VirtualHardDiskSettingData with that information.
Parses the hard disk SettingData embedded instance returned from the server and
creates a new VirtualHardDiskSettingData with that information.
The disk SettingData embedded instance.
A object with the data contained in
the embedded instance.
If either param is null.
If there was a problem parsing the embedded instance.
/// <summary>
/// Parses the hard disk SettingData embedded instance returned from the server and
/// creates a new VirtualHardDiskSettingData with that information.
/// </summary>
/// <param name="embeddedInstance">The disk SettingData embedded instance.</param>
/// <returns>A <see cref="VirtualHardDiskSettingData"/> object with the data contained in
/// the embedded instance.</returns>
/// <exception cref="ArgumentNullException">If either param is null.</exception>
/// <exception cref="FormatException">If there was a problem parsing the embedded instance.
/// </exception>
public static VirtualHardDiskSettingData
Parse(
string embeddedInstance)
{
VirtualHardDiskType type = VirtualHardDiskType.Unknown;
VirtualHardDiskFormat format = VirtualHardDiskFormat.Unknown;
string path = string.Empty;
string parentPath = string.Empty;
Int64 maxInternalSize = 0;
Int32 blockSize = 0;
Int32 logicalSectorSize = 0;
Int32 physicalSectorSize = 0;
XmlDocument doc = new XmlDocument();
doc.LoadXml(embeddedInstance);
XmlNodeList nodelist = doc.SelectNodes(@"/INSTANCE/@CLASSNAME");
if (nodelist.Count != 1)
{
throw new FormatException();
}
if (nodelist[0].Value != "Msvm_VirtualHardDiskSettingData")
{
throw new FormatException();
}
// Disk type
nodelist = doc.SelectNodes(@"//PROPERTY[@NAME = 'Type']/VALUE/child::text()");
if (nodelist.Count != 1)
{
throw new FormatException();
}
int itype =
int.Parse(nodelist[0].Value, NumberStyles.None, CultureInfo.InvariantCulture);
type = (VirtualHardDiskType)itype;
if (type != VirtualHardDiskType.Differencing &&
type != VirtualHardDiskType.DynamicallyExpanding &&
type != VirtualHardDiskType.FixedSize)
{
// The type integer returned is of an unrecognized type.
throw new FormatException();
}
// Disk format
nodelist = doc.SelectNodes(@"//PROPERTY[@NAME = 'Format']/VALUE/child::text()");
if (nodelist.Count != 1)
{
throw new FormatException();
}
int iformat =
int.Parse(nodelist[0].Value, NumberStyles.None, CultureInfo.InvariantCulture);
format = (VirtualHardDiskFormat)iformat;
if (format != VirtualHardDiskFormat.Vhd &&
format != VirtualHardDiskFormat.Vhdx)
{
//The format integer returned is of an unrecognized type.
throw new FormatException();
}
// Path
nodelist = doc.SelectNodes(@"//PROPERTY[@NAME = 'Path']/VALUE/child::text()");
if (nodelist.Count != 1)
{
// There can not be multiple parents.
throw new FormatException();
}
path = nodelist[0].Value;
// ParentPath
nodelist = doc.SelectNodes(@"//PROPERTY[@NAME = 'ParentPath']/VALUE/child::text()");
// A nodeList.Count == 0 is okay and indicates that there is no parent.
if (nodelist.Count == 1)
{
parentPath = nodelist[0].Value;
}
else if (nodelist.Count != 0)
{
// There can not be multiple parents.
throw new FormatException();
}
if (type == VirtualHardDiskType.Differencing && string.IsNullOrEmpty(parentPath))
{
// Parent path must be set if this is a differencing disk.
throw new FormatException();
}
// MaxInternalSize
nodelist =
doc.SelectNodes(@"//PROPERTY[@NAME = 'MaxInternalSize']/VALUE/child::text()");
if (nodelist.Count != 1)
{
throw new FormatException();
}
maxInternalSize = Int64.Parse(nodelist[0].Value, CultureInfo.InvariantCulture);
// BlockSize
nodelist =
doc.SelectNodes(@"//PROPERTY[@NAME = 'BlockSize']/VALUE/child::text()");
if (nodelist.Count != 1)
{
throw new FormatException();
}
blockSize = Int32.Parse(nodelist[0].Value, CultureInfo.InvariantCulture);
// LogicalSectorSize
nodelist =
doc.SelectNodes(@"//PROPERTY[@NAME = 'LogicalSectorSize']/VALUE/child::text()");
if (nodelist.Count != 1)
{
throw new FormatException();
}
logicalSectorSize = Int32.Parse(nodelist[0].Value, CultureInfo.InvariantCulture);
// PhysicalSectorSize
nodelist =
doc.SelectNodes(@"//PROPERTY[@NAME = 'PhysicalSectorSize']/VALUE/child::text()");
if (nodelist.Count != 1)
{
throw new FormatException();
}
physicalSectorSize = Int32.Parse(nodelist[0].Value, CultureInfo.InvariantCulture);
return new VirtualHardDiskSettingData(type, format, path, parentPath,
maxInternalSize, blockSize, logicalSectorSize, physicalSectorSize);
}
