Following a discussion with an associate at work about various ways to
build strings from variables in python, I'd like to hear your opinions
and preferred methods. The methods we discussed are:
1. some_string = "cd %s ; %s %d %s %s" % ( working_dir, ssh_cmd,
some_count, some_param1, some_param2)
2. import string
template = string.Template("cd $dir ; $cmd $count $param1
$param2")
some_string = template.substitute(dict(dir=working_dir,
cmd=ssh_cmd,
count=some_count,
pararm1=some_param1,
param2=some_param2))
here you can use a couple of nice tricks by using class.__dict__ and
globals() \ locals() dictionaries.
3. some_string = "cd "+working_dir+" ; "+ssh_cmd+ "
"+str(some_count)+" "+some_param1+" "+some_param2
(all these are supposed to produce the same strings)
Which methods do you know of \ prefer \ think is better because...?
I will appreciate any opinions about the matter. 3 1803
Gal Diskin wrote:
Following a discussion with an associate at work about various ways to
build strings from variables in python, I'd like to hear your opinions
and preferred methods. The methods we discussed are:
1. some_string = "cd %s ; %s %d %s %s" % ( working_dir, ssh_cmd,
some_count, some_param1, some_param2)
2. import string
template = string.Template("cd $dir ; $cmd $count $param1
$param2")
some_string = template.substitute(dict(dir=working_dir,
cmd=ssh_cmd,
count=some_count,
pararm1=some_param1,
param2=some_param2))
here you can use a couple of nice tricks by using class.__dict__ and
globals() \ locals() dictionaries.
3. some_string = "cd "+working_dir+" ; "+ssh_cmd+ "
"+str(some_count)+" "+some_param1+" "+some_param2
(all these are supposed to produce the same strings)
Which methods do you know of \ prefer \ think is better because...?
I will appreciate any opinions about the matter.
My opinion is that 1st method is the best. It's both very readable and
easy to write. 2nd way is too involved, and 3rd way is both hard to
read and difficult to compose. Another useful variant of method #1 is
to do this: %(varname)s ..." % globals()
Gal Diskin wrote:
Following a discussion with an associate at work about various ways to
build strings from variables in python, I'd like to hear your opinions
and preferred methods. The methods we discussed are:
1. some_string = "cd %s ; %s %d %s %s" % ( working_dir, ssh_cmd,
some_count, some_param1, some_param2)
....
Or another for readability:
4. some_string = ' '.join(["cd", working_dir, ";",
ssh_cmd, str(some_count), some_param1, some_param2])
--Scott David Daniels sc***********@acm.org
Matthew Warren wrote:
-----Original Message-----
From:
py*******************************************@pyth on.org
[mailto:py***************************************** **@python.o
rg] On Behalf Of Gal Diskin
Sent: 05 October 2006 16:01
To: py*********@python.org
Subject: building strings from variables
Following a discussion with an associate at work about various ways to
build strings from variables in python, I'd like to hear your opinions
and preferred methods. The methods we discussed are:
1. some_string = "cd %s ; %s %d %s %s" % ( working_dir, ssh_cmd,
some_count, some_param1, some_param2)
2. import string
template = string.Template("cd $dir ; $cmd $count $param1
$param2")
some_string = template.substitute(dict(dir=working_dir,
cmd=ssh_cmd,
count=some_count,
pararm1=some_param1,
param2=some_param2))
here you can use a couple of nice tricks by using class.__dict__ and
globals() \ locals() dictionaries.
3. some_string = "cd "+working_dir+" ; "+ssh_cmd+ "
"+str(some_count)+" "+some_param1+" "+some_param2
(all these are supposed to produce the same strings)
Which methods do you know of \ prefer \ think is better because...?
I will appreciate any opinions about the matter.
:D
I think, it would depend really on what your aims are (readable code,
fast string generation...), and how the vars you want to build the
string from are respresented in your code (is it natural to use a dict
etc..)
I kicked off a conversation similar to this earlier today, and that was
my conclusion after helpful debate & advice.
Matt.
This email is confidential and may be privileged. If you are not the intended recipient please notify the sender immediately and delete the email from your computer.
You should not copy the email, use it for any purpose or disclose its contents to any other person.
Please note that any views or opinions presented in this email may be personal to the author and do not necessarily represent the views or opinions of Digica.
It is the responsibility of the recipient to check this email for the presence of viruses. Digica accepts no liability for any damage caused by any virus transmitted by this email.
UK: Phoenix House, Colliers Way, Nottingham, NG8 6AT UK
Reception Tel: + 44 (0) 115 977 1177
Support Centre: 0845 607 7070
Fax: + 44 (0) 115 977 7000 http://www.digica.com
SOUTH AFRICA: Building 3, Parc du Cap, Mispel Road, Bellville, 7535, South Africa
Tel: + 27 (0) 21 957 4900
Fax: + 27 (0) 21 948 3135 http://www.digica.com
Matt,
Thanks for replying. I tried looking up your discussion and I'm unsure
if I found the right post. Would you mind linking to it?
--
Gal Diskin G_********@Intel.com G_********@gmail.com
Work: +972-4-865-1637
Cell: +972-54-7594166 This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics
by: meckhert |
last post by:
I am currently building a sports web application and have run into a
design question.
In order to create a new coach record, there are two pieces of
information that are needed: 1) username 2)...
|
by: Adrian Parker |
last post by:
I'm using the code below in my project. When I print all of these fixed
length string variables, one per line, they strings in questions do not
properly pad with 0s. strQuantity prints as " ...
|
by: Olaf Meyer |
last post by:
Sometimes if find it clumsy unsing the following approach building strings:
cmd = "%s -start %s -end %s -dir %s" % (executable, startTime, endTime,
directory)
Especially if you have a lot of...
|
by: ILCSP |
last post by:
Hi, I have a sql table containing the answers for some tests. The
information in this table is presented vertically and I need to create
strings with them. I know how to read the data in VB.Net...
|
by: Hans |
last post by:
Hi,
I want to define a couple of constant strings, like in C:
#define mystring "This is my string"
or using a const char construction.
Is this really not possible in Python?
Hans
|
by: flameboy |
last post by:
I am currently trying to figure my way how to output strings to a file.
I have seen all the many posts and such how to do it in a console program, and have had much success doing it that way. This...
|
by: john |
last post by:
All:
I'm a long-time developer, new to PHP....
Is there an idiom used in PHP to construct SQL statments from $_POST
data?
I would guess that in many applications, the data read from $_POST...
|
by: patriciashoe |
last post by:
Good AM:
I have struggling with constructing a string to execute some SQL. Here is my update statement
update teacherresources set = (( / variable1) * Variable 2 )) where(( trschool_id...
|
by: CloudSolutions |
last post by:
Introduction:
For many beginners and individual users, requiring a credit card and email registration may pose a barrier when starting to use cloud servers. However, some cloud server providers now...
|
by: Faith0G |
last post by:
I am starting a new it consulting business and it's been a while since I setup a new website. Is wordpress still the best web based software for hosting a 5 page website? The webpages will be...
|
by: taylorcarr |
last post by:
A Canon printer is a smart device known for being advanced, efficient, and reliable. It is designed for home, office, and hybrid workspace use and can also be used for a variety of purposes. However,...
|
by: aa123db |
last post by:
Variable and constants
Use var or let for variables and const fror constants.
Var foo ='bar';
Let foo ='bar';const baz ='bar';
Functions
function $name$ ($parameters$) {
}
...
|
by: ryjfgjl |
last post by:
In our work, we often receive Excel tables with data in the same format. If we want to analyze these data, it can be difficult to analyze them because the data is spread across multiple Excel files...
|
by: BarryA |
last post by:
What are the essential steps and strategies outlined in the Data Structures and Algorithms (DSA) roadmap for aspiring data scientists? How can individuals effectively utilize this roadmap to progress...
|
by: nemocccc |
last post by:
hello, everyone, I want to develop a software for my android phone for daily needs, any suggestions?
|
by: Sonnysonu |
last post by:
This is the data of csv file
1 2 3
1 2 3
1 2 3
1 2 3
2 3
2 3
3
the lengths should be different i have to store the data by column-wise with in the specific length.
suppose the i have to...
|
by: Hystou |
last post by:
There are some requirements for setting up RAID:
1. The motherboard and BIOS support RAID configuration.
2. The motherboard has 2 or more available SATA protocol SSD/HDD slots (including MSATA, M.2...
| |