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50  <h1>Source code for sas.plottools.unitConverter</h1><div class="highlight"><pre>
51<span class="kn">import</span> <span class="nn">re</span>
52<span class="kn">import</span> <span class="nn">string</span>
53<span class="c">#Input   -&gt;  new scale  -&gt;  Output</span>
54
55<span class="n">unit1</span> <span class="o">=</span> <span class="s">&quot;A^{-1} &quot;</span>  <span class="c">#             x                    A^{-1}</span>
56<span class="n">unit2</span> <span class="o">=</span> <span class="s">&quot;A&quot;</span>  <span class="c">#                   x                     A</span>
57<span class="n">unit3</span> <span class="o">=</span> <span class="s">&quot;A&quot;</span>  <span class="c">#                   x^2                  A^{2}</span>
58<span class="n">unit4</span> <span class="o">=</span> <span class="s">&quot;A &quot;</span>  <span class="c">#                  1/x                  A^{-1}</span>
59<span class="n">unit5</span> <span class="o">=</span> <span class="s">&quot;A^{0.5} &quot;</span>  <span class="c">#        x^2                      A</span>
60<span class="n">unit9</span> <span class="o">=</span> <span class="s">&quot;m^{1/2}&quot;</span>  <span class="c">#         x^2               m</span>
61
62<span class="c">#If you don&#39;t recognize the pattern, give up</span>
63<span class="c"># and just put some parentheses around the unit and write the transoformation:</span>
64
65<span class="n">unit6</span> <span class="o">=</span> <span class="s">&quot;m/s&quot;</span>  <span class="c">#                x^2               (m/s)^{2}</span>
66<span class="n">unit7</span> <span class="o">=</span> <span class="s">&quot;m/s^{2}&quot;</span>  <span class="c">#         1/x                 (m/s^{2})^{-1}</span>
67<span class="n">unit8</span> <span class="o">=</span> <span class="s">&quot;m/s^{4}&quot;</span>  <span class="c">#         x^2               (m/s^{4})^{2}</span>
68
69
70<div class="viewcode-block" id="UnitConvertion"><a class="viewcode-back" href="../../../dev/api/sas.plottools.html#sas.plottools.unitConverter.UnitConvertion">[docs]</a><span class="k">def</span> <span class="nf">UnitConvertion</span><span class="p">(</span><span class="nb">pow</span><span class="p">,</span> <span class="n">unit</span><span class="p">):</span>
71    <span class="sd">&quot;&quot;&quot;</span>
72<span class="sd">    &quot;&quot;&quot;</span>
73    <span class="k">if</span> <span class="nb">pow</span> <span class="o">!=</span> <span class="mi">0</span><span class="p">:</span>
74        <span class="k">if</span> <span class="n">string</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">unit</span><span class="p">,</span> <span class="s">&quot;^&quot;</span><span class="p">)</span> <span class="o">!=</span> <span class="o">-</span><span class="mi">1</span><span class="p">:</span>  <span class="c"># if the unit contains a power ^</span>
75            <span class="n">unitSplitted</span> <span class="o">=</span> <span class="n">re</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s">&quot;\^&quot;</span><span class="p">,</span> <span class="n">unit</span><span class="p">)</span>
76            <span class="k">if</span> <span class="n">string</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">unitSplitted</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="s">&quot;/&quot;</span><span class="p">)</span> <span class="o">!=</span> <span class="o">-</span><span class="mi">1</span> <span class="ow">or</span>\
77                <span class="n">string</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">unitSplitted</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="s">&quot;-&quot;</span><span class="p">)</span> <span class="o">!=</span> <span class="o">-</span><span class="mi">1</span> <span class="p">:</span>  <span class="c"># find slash /</span>
78                <span class="k">if</span> <span class="nb">pow</span> <span class="o">==</span> <span class="mi">1</span><span class="p">:</span>
79                    <span class="n">unit</span> <span class="o">=</span> <span class="n">unit</span>
80                <span class="k">else</span><span class="p">:</span>
81                    <span class="n">unit</span> <span class="o">=</span> <span class="s">&quot;(&quot;</span><span class="o">+</span><span class="n">unit</span><span class="o">+</span><span class="s">&quot;)&quot;</span> <span class="o">+</span> <span class="s">&quot;^{&quot;</span><span class="o">+</span> <span class="nb">str</span><span class="p">(</span><span class="nb">pow</span><span class="p">)</span> <span class="o">+</span> <span class="s">&quot;}&quot;</span>
82            <span class="k">else</span><span class="p">:</span>
83                <span class="k">if</span> <span class="n">string</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">unitSplitted</span><span class="p">[</span><span class="mi">1</span><span class="p">],</span> <span class="s">&quot;{&quot;</span><span class="p">)</span> <span class="o">!=</span> <span class="o">-</span><span class="mi">1</span><span class="p">:</span>  <span class="c"># if found a {</span>
84                    <span class="n">findPower</span> <span class="o">=</span> <span class="n">re</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s">&quot;{&quot;</span><span class="p">,</span> <span class="n">unitSplitted</span><span class="p">[</span><span class="mi">1</span><span class="p">])</span>
85                    <span class="k">if</span> <span class="n">string</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">findPower</span><span class="p">[</span><span class="mi">1</span><span class="p">],</span> <span class="s">&quot;}&quot;</span><span class="p">)</span> <span class="o">!=</span> <span class="o">-</span><span class="mi">1</span><span class="p">:</span>  <span class="c"># found }</span>
86                        <span class="n">unitPower</span> <span class="o">=</span> <span class="n">re</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s">&quot;}&quot;</span><span class="p">,</span> <span class="n">findPower</span><span class="p">[</span><span class="mi">1</span><span class="p">])</span>
87                        <span class="k">if</span><span class="p">(</span><span class="n">string</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">unitPower</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="s">&quot;.&quot;</span><span class="p">)</span> <span class="o">!=</span> <span class="o">-</span><span class="mi">1</span><span class="p">):</span>
88                            <span class="n">power</span> <span class="o">=</span> <span class="nb">float</span><span class="p">(</span><span class="n">unitPower</span><span class="p">[</span><span class="mi">0</span><span class="p">])</span> <span class="o">*</span> <span class="nb">pow</span>
89                        <span class="k">elif</span><span class="p">(</span><span class="n">string</span><span class="o">.</span><span class="n">find</span><span class="p">(</span><span class="n">unitPower</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="s">&quot;/&quot;</span><span class="p">)</span> <span class="o">!=</span> <span class="o">-</span><span class="mi">1</span><span class="p">):</span>
90                            <span class="c">#power is a float</span>
91                            <span class="n">poweSplitted</span> <span class="o">=</span> <span class="n">re</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s">&quot;/&quot;</span><span class="p">,</span> <span class="n">unitPower</span><span class="p">[</span><span class="mi">0</span><span class="p">])</span>
92                            <span class="n">power</span> <span class="o">=</span> <span class="nb">pow</span> <span class="o">*</span> <span class="nb">int</span><span class="p">(</span><span class="n">poweSplitted</span><span class="p">[</span><span class="mi">0</span><span class="p">])</span>\
93                                         <span class="o">/</span><span class="nb">int</span><span class="p">(</span><span class="n">poweSplitted</span><span class="p">[</span><span class="mi">1</span><span class="p">])</span>
94                        <span class="k">else</span><span class="p">:</span>
95                            <span class="n">power</span> <span class="o">=</span> <span class="nb">int</span><span class="p">(</span><span class="n">unitPower</span><span class="p">[</span><span class="mi">0</span><span class="p">])</span> <span class="o">*</span> <span class="nb">pow</span>
96                       
97                        <span class="k">if</span> <span class="n">power</span> <span class="o">==</span> <span class="mf">1.0</span><span class="p">:</span>
98                            <span class="n">unit</span> <span class="o">=</span> <span class="n">unitSplitted</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
99                        <span class="k">elif</span> <span class="n">power</span> <span class="o">==</span> <span class="mf">0.5</span><span class="p">:</span>
100                            <span class="n">unit</span> <span class="o">=</span> <span class="n">unitSplitted</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">+</span> <span class="s">&quot;^{1/2}&quot;</span>
101                        <span class="k">elif</span> <span class="n">power</span> <span class="o">==</span> <span class="o">-</span><span class="mf">0.5</span><span class="p">:</span>
102                            <span class="n">unit</span> <span class="o">=</span> <span class="n">unitSplitted</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">+</span> <span class="s">&quot;^{-1/2}&quot;</span>
103                        <span class="k">else</span><span class="p">:</span>
104                            <span class="n">unit</span> <span class="o">=</span> <span class="n">unitSplitted</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">+</span> <span class="s">&quot;^{&quot;</span> <span class="o">+</span> <span class="nb">str</span><span class="p">(</span><span class="n">power</span><span class="p">)</span> <span class="o">+</span> <span class="s">&quot;}&quot;</span>
105                <span class="k">else</span><span class="p">:</span>
106                     <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">,</span> <span class="s">&quot;missing } in unit expression&quot;</span>
107        <span class="k">else</span><span class="p">:</span>  <span class="c"># no power</span>
108            <span class="k">if</span>  <span class="nb">pow</span> <span class="o">!=</span> <span class="mi">1</span><span class="p">:</span>
109                <span class="n">unit</span> <span class="o">=</span> <span class="s">&quot;(&quot;</span> <span class="o">+</span> <span class="n">unit</span> <span class="o">+</span> <span class="s">&quot;)&quot;</span> <span class="o">+</span> <span class="s">&quot;^{&quot;</span> <span class="o">+</span> <span class="nb">str</span><span class="p">(</span><span class="nb">pow</span><span class="p">)</span> <span class="o">+</span> <span class="s">&quot;}&quot;</span>
110    <span class="k">else</span><span class="p">:</span>
111        <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">,</span> <span class="s">&quot;empty unit ,enter a power different from zero&quot;</span>
112    <span class="k">return</span> <span class="n">unit</span>
113
114</div>
115<span class="k">if</span> <span class="n">__name__</span> <span class="o">==</span> <span class="s">&quot;__main__&quot;</span><span class="p">:</span> 
116    <span class="k">print</span> <span class="s">&quot;this unit1 </span><span class="si">%s</span><span class="s"> ,its power </span><span class="si">%s</span><span class="s"> , and value </span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="p">(</span><span class="n">unit1</span><span class="p">,</span>
117                                                <span class="mi">1</span><span class="p">,</span> <span class="n">UnitConvertion</span><span class="p">(</span><span class="mi">1</span><span class="p">,</span> <span class="n">unit1</span><span class="p">))</span>
118    <span class="k">print</span> <span class="s">&quot;this unit2 </span><span class="si">%s</span><span class="s"> ,its power </span><span class="si">%s</span><span class="s"> , and value </span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="p">(</span><span class="n">unit2</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span>
119                                                <span class="n">UnitConvertion</span><span class="p">(</span><span class="mi">1</span><span class="p">,</span> <span class="n">unit2</span><span class="p">))</span>
120    <span class="k">print</span> <span class="s">&quot;this unit3 </span><span class="si">%s</span><span class="s"> ,its power </span><span class="si">%s</span><span class="s"> , and value </span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="p">(</span><span class="n">unit3</span><span class="p">,</span> <span class="mi">2</span><span class="p">,</span>
121                                                    <span class="n">UnitConvertion</span><span class="p">(</span><span class="mi">2</span><span class="p">,</span> <span class="n">unit3</span><span class="p">))</span>
122    <span class="k">print</span> <span class="s">&quot;this unit4 </span><span class="si">%s</span><span class="s"> ,its power </span><span class="si">%s</span><span class="s"> , and value </span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="p">(</span><span class="n">unit4</span><span class="p">,</span> <span class="o">-</span><span class="mi">1</span><span class="p">,</span>
123                                                <span class="n">UnitConvertion</span><span class="p">(</span><span class="o">-</span><span class="mi">1</span><span class="p">,</span> <span class="n">unit4</span><span class="p">))</span>
124    <span class="k">print</span> <span class="s">&quot;this unit5 </span><span class="si">%s</span><span class="s"> ,its power </span><span class="si">%s</span><span class="s"> , and value </span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="p">(</span><span class="n">unit5</span><span class="p">,</span> <span class="mi">2</span><span class="p">,</span>
125                                                    <span class="n">UnitConvertion</span><span class="p">(</span><span class="mi">2</span><span class="p">,</span> <span class="n">unit5</span><span class="p">))</span>
126    <span class="k">print</span> <span class="s">&quot;this unit6 </span><span class="si">%s</span><span class="s"> ,its power </span><span class="si">%s</span><span class="s"> , and value </span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="p">(</span><span class="n">unit6</span><span class="p">,</span> <span class="mi">2</span><span class="p">,</span>
127                                                    <span class="n">UnitConvertion</span><span class="p">(</span><span class="mi">2</span><span class="p">,</span> <span class="n">unit6</span><span class="p">))</span>
128    <span class="k">print</span> <span class="s">&quot;this unit7 </span><span class="si">%s</span><span class="s"> ,its power </span><span class="si">%s</span><span class="s"> , and value </span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="p">(</span><span class="n">unit7</span><span class="p">,</span> <span class="o">-</span><span class="mi">1</span><span class="p">,</span>
129                                                    <span class="n">UnitConvertion</span><span class="p">(</span><span class="o">-</span><span class="mi">1</span><span class="p">,</span> <span class="n">unit7</span><span class="p">))</span>
130    <span class="k">print</span> <span class="s">&quot;this unit8 </span><span class="si">%s</span><span class="s"> ,its power </span><span class="si">%s</span><span class="s"> , and value </span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="p">(</span><span class="n">unit8</span><span class="p">,</span> <span class="mi">2</span><span class="p">,</span>
131                                                    <span class="n">UnitConvertion</span><span class="p">(</span><span class="mi">2</span><span class="p">,</span> <span class="n">unit8</span><span class="p">))</span>
132    <span class="k">print</span> <span class="s">&quot;this unit9 </span><span class="si">%s</span><span class="s"> ,its power </span><span class="si">%s</span><span class="s"> , and value </span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="p">(</span><span class="n">unit9</span><span class="p">,</span> <span class="mi">2</span><span class="p">,</span>
133                                                    <span class="n">UnitConvertion</span><span class="p">(</span><span class="mi">2</span><span class="p">,</span> <span class="n">unit9</span><span class="p">))</span>
134</pre></div>
135
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