<span style="color:rgb(0,0,0);font-family:&#39;lucida grande&#39;,&#39;Lucida Sans Unicode&#39;,tahoma,sans-serif;font-size:13px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:18px;text-align:left;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);display:inline!important;float:none">Hello,<br>
<br>I have written a module in Python for calculating refractive index under different environmental conditions, and for converting wavelength of light between air and vacuum.<span class="Apple-converted-space"> </span></span> The code is based on the documentation for the  <span style="color:rgb(51,51,51);font-family:helvetica,arial,freesans,clean,sans-serif;font-size:14px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:22px;text-align:-webkit-auto;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);display:inline!important;float:none"><span class="Apple-converted-space"></span></span><a href="http://emtoolbox.nist.gov/Wavelength/Documentation.asp" style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;color:rgb(65,131,196);text-decoration:underline;outline-style:none;outline-width:initial;outline-color:initial;font-family:helvetica,arial,freesans,clean,sans-serif;font-size:14px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:22px;text-align:-webkit-auto;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255)">NIST online refractive index of air calculator</a>.<br style="color:rgb(0,0,0);font-family:&#39;lucida grande&#39;,&#39;Lucida Sans Unicode&#39;,tahoma,sans-serif;font-size:13px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:18px;text-align:left;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255)">
<br style="color:rgb(0,0,0);font-family:&#39;lucida grande&#39;,&#39;Lucida Sans Unicode&#39;,tahoma,sans-serif;font-size:13px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:18px;text-align:left;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255)">
<span style="color:rgb(0,0,0);font-family:&#39;lucida grande&#39;,&#39;Lucida Sans Unicode&#39;,tahoma,sans-serif;font-size:13px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:18px;text-align:left;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);display:inline!important;float:none">It would be great to know how this compares to existing tools used by astronomers in their research level code.<span class="Apple-converted-space"> </span></span>The function<br>
&quot;ref_index._test_idlastro()&quot; includes some comparison with IDLASTRO vac2air and air2vac procedures.<span class="nf" style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;color:rgb(153,0,0);font-weight:bold;font-family:&#39;Bitstream Vera Sans Mono&#39;,&#39;Courier New&#39;,monospace;font-size:12px;font-style:normal;font-variant:normal;letter-spacing:normal;line-height:16px;text-align:-webkit-auto;text-indent:0px;text-transform:none;white-space:pre;word-spacing:0px;background-color:rgb(255,255,255)"></span><span class="p" style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;color:rgb(51,51,51);font-family:&#39;Bitstream Vera Sans Mono&#39;,&#39;Courier New&#39;,monospace;font-size:12px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:16px;text-align:-webkit-auto;text-indent:0px;text-transform:none;white-space:pre;word-spacing:0px;background-color:rgb(255,255,255)"></span><br style="color:rgb(0,0,0);font-family:&#39;lucida grande&#39;,&#39;Lucida Sans Unicode&#39;,tahoma,sans-serif;font-size:13px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:18px;text-align:left;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255)">
<br style="color:rgb(0,0,0);font-family:&#39;lucida grande&#39;,&#39;Lucida Sans Unicode&#39;,tahoma,sans-serif;font-size:13px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:18px;text-align:left;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255)">
<span style="color:rgb(0,0,0);font-family:&#39;lucida grande&#39;,&#39;Lucida Sans Unicode&#39;,tahoma,sans-serif;font-size:13px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:18px;text-align:left;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);display:inline!important;float:none">The module is available at<span class="Apple-converted-space"> </span></span><a rel="nofollow" href="http://pypi.python.org/pypi/ref_index" style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;border-style:initial;border-color:initial;outline-width:0px;outline-style:initial;outline-color:initial;font-weight:normal;font-style:normal;font-size:13px;font-family:&#39;lucida grande&#39;,&#39;Lucida Sans Unicode&#39;,tahoma,sans-serif;vertical-align:baseline;text-decoration:none;color:rgb(30,121,167);font-variant:normal;letter-spacing:normal;line-height:18px;text-align:left;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255)">http://pypi.python.org/pypi/ref_index</a><span style="color:rgb(0,0,0);font-family:&#39;lucida grande&#39;,&#39;Lucida Sans Unicode&#39;,tahoma,sans-serif;font-size:13px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:18px;text-align:left;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);display:inline!important;float:none">. It has no dependencies outside of standard Python libraries. It can be installed using &quot;pip install ref_index&quot;.</span><br style="color:rgb(0,0,0);font-family:&#39;lucida grande&#39;,&#39;Lucida Sans Unicode&#39;,tahoma,sans-serif;font-size:13px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:18px;text-align:left;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255)">
<br style="color:rgb(0,0,0);font-family:&#39;lucida grande&#39;,&#39;Lucida Sans Unicode&#39;,tahoma,sans-serif;font-size:13px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:18px;text-align:left;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255)">
<span style="color:rgb(0,0,0);font-family:&#39;lucida grande&#39;,&#39;Lucida Sans Unicode&#39;,tahoma,sans-serif;font-size:13px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:18px;text-align:left;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);display:inline!important;float:none">Documentation is available within the source code, and it can also be displayed in interactive Python/iPython session by typing &quot;help(ref_index)&quot; after importing ref_index. All functions also have documentation.<span class="Apple-converted-space"> </span></span><code style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;padding-top:4px;padding-right:8px;padding-bottom:4px;padding-left:8px;border-top-width:1px;border-right-width:1px;border-bottom-width:1px;border-left-width:1px;border-style:initial;border-color:initial;outline-width:0px;outline-style:initial;outline-color:initial;font-weight:normal;font-style:normal;font-size:11px;font-family:monospace;vertical-align:baseline;border-top-left-radius:2px;border-top-right-radius:2px;border-bottom-right-radius:2px;border-bottom-left-radius:2px;background-image:initial;background-color:rgb(255,255,255);white-space:pre;overflow-x:auto;overflow-y:auto;border-top-style:solid;border-right-style:solid;border-bottom-style:solid;border-left-style:solid;border-top-color:rgb(238,238,204);border-right-color:rgb(238,238,204);border-bottom-color:rgb(238,238,204);border-left-color:rgb(238,238,204);color:rgb(0,0,0);font-variant:normal;letter-spacing:normal;line-height:18px;text-align:left;text-indent:0px;text-transform:none;word-spacing:0px;background-repeat:initial initial"></code><br>
<br style="color:rgb(0,0,0);font-family:&#39;lucida grande&#39;,&#39;Lucida Sans Unicode&#39;,tahoma,sans-serif;font-size:13px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:18px;text-align:left;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255)">
<span style="color:rgb(0,0,0);font-family:&#39;lucida grande&#39;,&#39;Lucida Sans Unicode&#39;,tahoma,sans-serif;font-size:13px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:18px;text-align:left;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);display:inline!important;float:none">The development repository is at<span class="Apple-converted-space"> </span></span><a rel="nofollow" href="https://github.com/phn/ref_index" style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;border-top-width:0px;border-right-width:0px;border-bottom-width:0px;border-left-width:0px;border-style:initial;border-color:initial;outline-width:0px;outline-style:initial;outline-color:initial;font-weight:normal;font-style:normal;font-size:13px;font-family:&#39;lucida grande&#39;,&#39;Lucida Sans Unicode&#39;,tahoma,sans-serif;vertical-align:baseline;text-decoration:none;color:rgb(30,121,167);font-variant:normal;letter-spacing:normal;line-height:18px;text-align:left;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255)">https://github.com/phn/ref_index</a> .<br>
<br style="color:rgb(0,0,0);font-family:&#39;lucida grande&#39;,&#39;Lucida Sans Unicode&#39;,tahoma,sans-serif;font-size:13px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:18px;text-align:left;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255)">
<span style="color:rgb(0,0,0);font-family:&#39;lucida grande&#39;,&#39;Lucida Sans Unicode&#39;,tahoma,sans-serif;font-size:13px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:18px;text-align:left;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);display:inline!important;float:none">Thanks<br>
Prasanth<br></span>