python: find and replace numbers < 1 in text file

Posted by hjp on Stack Overflow See other posts from Stack Overflow or by hjp
Published on 2010-04-21T17:09:56Z Indexed on 2010/04/21 17:13 UTC
Read the original article Hit count: 174

Filed under:

python

|

search-and-replace

I'm pretty new to Python programming and would appreciate some help to a problem I have...

Basically I have multiple text files which contain velocity values as such:

0.259515E+03 0.235095E+03 0.208262E+03 0.230223E+03 0.267333E+03 0.217889E+03 0.156233E+03 0.144876E+03 0.136187E+03 0.137865E+00

etc for many lines...

What I need to do is convert all the values in the text file that are less than 1 (e.g. 0.137865E+00 above) to an arbitrary value of 0.100000E+01. While it seems pretty simple to replace specific values with the 'replace()' method and a while loop, how do you do this if you want to replace a range?

thanks

© Stack Overflow or respective owner

Related posts about python

unmet dependencies in Ubuntu 12.04

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I tried today to install a dvb-card on my Ubuntu 12.04 (Linux blauhai-linux 3.2.0-25-generic #40-Ubuntu SMP Wed May 23 20:30:51 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux ). The installation failed with an error. After that, i tried to install python (it was already installed but i got this error): linux:~$… >>> More
How can I get sikuli-ide to work?

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I installed sikuli-ide with sudo apt-get install sikuli-ide Everything was fine until I tried to start it from the terminal. I typed sikuli-ide But the only response I got was [info] locale: en_US The application was not started, furthermore there is no desktop file and sikuli-ide does not… >>> More
Getting PATH right for python after MacPorts install

as seen on Super User - Search for 'Super User'
I can't import some python libraries (PIL, psycopg2) that I just installed with MacPorts. I looked through these forums, and tried to adjust my PATH variable in $HOME/.bash_profile in order to fix this but it did not work. I added the location of PIL and psycopg2 to PATH. I know that Terminal is… >>> More
call python with system() in R to run a python script emulating the python console

as seen on Stack Overflow - Search for 'Stack Overflow'
I want to pass a chunk of Python code to Python in R with something like system('python ...'), and I'm wondering if there is an easy way to emulate the python console in this case. For example, suppose the code is "print 'hello world'", how can I get the output like this in R? >>> print… >>> More
Python - Calling a non python program from python?

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I am currently struggling to call a non python program from a python script. I have a ~1000 files that when passed through this C++ program will generate ~1000 outputs. Each output file must have a distinct name. The command I wish to run is of the form: program_name -input -output -o1 -o2… >>> More

Related posts about search-and-replace

Regex: Search and replace left side = to right side

as seen on Stack Overflow - Search for 'Stack Overflow'
How do I use regular expressions and search and replace to turn this [UserID] = <UserID, int,> [UserID] = 123123 [UserID] = asd123123 into [UserID] = [UserID] [UserID] = [UserID] [UserID] = [UserID] In other words I want to take everything from left side of the line up to the '=' character… >>> More
sed whole word search and replace

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, How do I search and replace whole words using sed? Doing sed -i 's/[oldtext]/[newtext]/g' will also replace partial matches of [oldtext] which I don't want it to do. Thanks, Kenneth >>> More
Perl Search and Replace Avoid Variable Interpolation

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm really getting my butt kicked here. I can not figure out how to write a search and replace that will properly find this string. String: $QData{"OrigFrom"} $Text{"wrote"}: Note: That is the actual STRING. Those are NOT variables. I didn't write it. I need to replace that string with nothing… >>> More
C# string "search and replace" using a regex

as seen on Stack Overflow - Search for 'Stack Overflow'
I need to do a 2 rule "replace" -- my rules are, replace all open parens, "(" with a hyphen "-" and strip out all closing parens ")". So for example this: "foobar(baz2)" would become "foobar-baz2" I currently do it like this -- but, my hunch regex would be cleaner. myString.Replace("(", "-")… >>> More
Search and replace macro in Netbeans

as seen on Stack Overflow - Search for 'Stack Overflow'
How do I record (or write) search and replace macro in Netbeans? I want to record the actions I do in Ctrl+H dialog. >>> More