<div>
Here is an example for you<br />
<br />
#!/usr/bin/python<br />
<br />
<br />
str = &quot;123456&quot;; &nbsp;# Only digit in this string<br />
print str.isdigit();<br />
<br />
str = &quot;this is string example....wow!!!&quot;;<br />
print str.isdigit();
</div>


<div>
Here is a link to the string doc you should really look at<br />
<a href="http://docs.python.org/library/stdtypes.html" rel="ugc">http://docs.python.org/library/stdtypes.html</a>
</div>


<div>
Or you can use isnumeric instead of isdigit
</div>


<div>
yes i know but it prints false for float... 
</div>


<div>
the isnumeric works the same as isdigit... <br />
so i tried to reverse it...<br />
it works for both integer and float but it gives an error if the string contains one or more integers and the rest are alphabet instead of printing &quot;Invalid Input&quot;... <br />
Is there any other method to solve this prob?<br />
<br />
while True: &nbsp; &nbsp; <br />
&nbsp; &nbsp; n1 = input(&quot;Enter the first number: &quot;)<br />
&nbsp; &nbsp; if n1.isalpha() == True:<br />
&nbsp; &nbsp; &nbsp; &nbsp; print(&quot;Invalid input!&quot;)<br />
&nbsp; &nbsp; else:<br />
&nbsp; &nbsp; &nbsp; &nbsp; n1 = float(n1)<br />
&nbsp; &nbsp; &nbsp; &nbsp; break
</div>


<div>
Well, you can certainly use RegEx if you want<br />
<br />
from re import match<br />
<br />
n.match(&quot;\d+(?:\.\d+)?&quot;)
</div>


<div>
can you explain this more in details... and i couldn't find match attribute in my python ver 3.2.2... thanks:)
</div>


<div>
Sorry, I am trying to do it but I have fever so I apologize.<br />
<br />
I am trying to use the regex library<br />
<br />
You will have to import <b>re</b> or just match<br />
<br />
from re import match<br />
<br />
<br />
Then you will have to use the match function.<br />
<br />
If you say<br />
import re<br />
<br />
You will have to use re.match()<br />
<br />
Also, my syntax was wrong.<br />
<br />
Give me a second let me give you the solution
</div>


<div>
&gt;&gt;&gt;no = &quot;123.456&quot;<br />
&gt;&gt;&gt;from re import match<br />
&gt;&gt;&gt;no.match(&quot;\d+(?:\.\d+)?<wbr />&quot;)<br />
Traceback (most recent call last):<br />
&nbsp; File &quot;&lt;pyshell#30&gt;&quot;, line 1, in &lt;module&gt;<br />
&nbsp; &nbsp; no.match(&quot;\d+(?:\.\d+)?&quot;)<br />
AttributeError: 'float' object has no attribute 'match'
</div>


<div>
Sorry for being so slow <br />
<br />
Here is what I have so far.<br />
<br />
<br />
&gt;&gt;&gt;&nbsp;b = re.match(&quot;\d+(?:\.\d+)?&quot;, &quot;171.1&quot;)<br />
&gt;&gt;&gt;&nbsp;b.group(0)<br />
'171.1'<br />
&gt;&gt;&gt;&nbsp;b = re.match(&quot;\d+(?:\.\d+)?&quot;, &quot;171.a&quot;)<br />
&gt;&gt;&gt;&nbsp;b.group(0)<br />
'171'<br />

</div>


<div>
Here is something you may like<br />
<br />
<br />
&gt;&gt;&gt;&nbsp;a = &quot;171.123&quot;<br />
&gt;&gt;&gt;&nbsp;from re import match<br />
&gt;&gt;&gt;&nbsp;b = match(&quot;\d+(?:\.\d+)?&quot;, a)<br />
&gt;&gt;&gt;&nbsp;if a == b.group(0):<br />
... &nbsp; &nbsp;print &quot;A number&quot;<br />
...<br />
A number<br />
&gt;&gt;&gt;&nbsp;a = &quot;171.12a&quot;<br />
&gt;&gt;&gt;&nbsp;b = match(&quot;\d+(?:\.\d+)?&quot;, a)<br />
&gt;&gt;&gt;&nbsp;if a == b.group(0):<br />
... &nbsp; &nbsp;print &quot;A number&quot;<br />
...<br />
&gt;&gt;&gt;<br />

</div>


<div>
At this time, I would suggest you to go with gelonida's solution and save yourself a lot of time. &nbsp;Just make it a separate function like isFloat. &nbsp;And check isnumeric and isFloat and then you will be all good to go.
</div>


<div>
<a href="http://stackoverflow.com/questions/379906/python-parse-string-to-float-or-int" rel="ugc">http://stackoverflow.com/questions/379906/python-parse-string-to-float-or-int</a><br />
<br />
<a href="http://rosettacode.org/wiki/Determine_if_a_string_is_numeric" rel="ugc">http://rosettacode.org/wiki/Determine_if_a_string_is_numeric</a>
</div>


<div>
Sorry for the late... N thanks for all the suggestions!
</div>


<div>
<div class="content wysiwyg-content">
Hi all,<br />
I was trying out to write a small prog to prompt the user input for numbers...<br />
I used the isdigit func to check whether the input is a number or string... it works but this doesn't accept float as a number... how can i do to make it works for both integer and float?<br />
<br />
while True: &nbsp; &nbsp; <br />
&nbsp; &nbsp; n1 = input(&quot;Enter the first number: &quot;)<br />
&nbsp; &nbsp; if n1.isdigit() == False:<br />
&nbsp; &nbsp; &nbsp; &nbsp; print(&quot;Invalid input!&quot;)<br />
&nbsp; &nbsp; else:<br />
&nbsp; &nbsp; &nbsp; &nbsp; n1 = int(n1)<br />
&nbsp; &nbsp; &nbsp; &nbsp; break
</div>
</div>


Hi all,
I was trying out to write a small prog to prompt the user input for numbers...
I used the isdigit func to check whether the input is a number or string... it works but this doesn't accept float as a number... how can i do to make it works for both integer and float?

while True:     
    n1 = input("Enter the first number: ")
    if n1.isdigit() == False:
        print("Invalid input!")
    else:
        n1 = int(n1)
        break

How can i check whether the input is a number or string

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