projects / OpenSPARC-T2-SAM / blame
| Commit | Line | Data |
|---|---|---|
| 920dae64 AT |
1 | <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> |
| 2 | <html> | |
| 3 | <head> | |
| 4 | <link rel="STYLESHEET" href="lib.css" type='text/css' /> | |
| 5 | <link rel="SHORTCUT ICON" href="../icons/pyfav.png" type="image/png" /> | |
| 6 | <link rel='start' href='../index.html' title='Python Documentation Index' /> | |
| 7 | <link rel="first" href="lib.html" title='Python Library Reference' /> | |
| 8 | <link rel='contents' href='contents.html' title="Contents" /> | |
| 9 | <link rel='index' href='genindex.html' title='Index' /> | |
| 10 | <link rel='last' href='about.html' title='About this document...' /> | |
| 11 | <link rel='help' href='about.html' title='About this document...' /> | |
| 12 | <link rel="next" href="module-StringIO.html" /> | |
| 13 | <link rel="prev" href="module-difflib.html" /> | |
| 14 | <link rel="parent" href="strings.html" /> | |
| 15 | <link rel="next" href="module-StringIO.html" /> | |
| 16 | <meta name='aesop' content='information' /> | |
| 17 | <title>4.5 fpformat -- Floating point conversions</title> | |
| 18 | </head> | |
| 19 | <body> | |
| 20 | <DIV CLASS="navigation"> | |
| 21 | <div id='top-navigation-panel' xml:id='top-navigation-panel'> | |
| 22 | <table align="center" width="100%" cellpadding="0" cellspacing="2"> | |
| 23 | <tr> | |
| 24 | <td class='online-navigation'><a rel="prev" title="4.4.4 Differ Example" | |
| 25 | href="differ-examples.html"><img src='../icons/previous.png' | |
| 26 | border='0' height='32' alt='Previous Page' width='32' /></A></td> | |
| 27 | <td class='online-navigation'><a rel="parent" title="4. String Services" | |
| 28 | href="strings.html"><img src='../icons/up.png' | |
| 29 | border='0' height='32' alt='Up One Level' width='32' /></A></td> | |
| 30 | <td class='online-navigation'><a rel="next" title="4.6 StringIO " | |
| 31 | href="module-StringIO.html"><img src='../icons/next.png' | |
| 32 | border='0' height='32' alt='Next Page' width='32' /></A></td> | |
| 33 | <td align="center" width="100%">Python Library Reference</td> | |
| 34 | <td class='online-navigation'><a rel="contents" title="Table of Contents" | |
| 35 | href="contents.html"><img src='../icons/contents.png' | |
| 36 | border='0' height='32' alt='Contents' width='32' /></A></td> | |
| 37 | <td class='online-navigation'><a href="modindex.html" title="Module Index"><img src='../icons/modules.png' | |
| 38 | border='0' height='32' alt='Module Index' width='32' /></a></td> | |
| 39 | <td class='online-navigation'><a rel="index" title="Index" | |
| 40 | href="genindex.html"><img src='../icons/index.png' | |
| 41 | border='0' height='32' alt='Index' width='32' /></A></td> | |
| 42 | </tr></table> | |
| 43 | <div class='online-navigation'> | |
| 44 | <b class="navlabel">Previous:</b> | |
| 45 | <a class="sectref" rel="prev" href="differ-examples.html">4.4.4 Differ Example</A> | |
| 46 | <b class="navlabel">Up:</b> | |
| 47 | <a class="sectref" rel="parent" href="strings.html">4. String Services</A> | |
| 48 | <b class="navlabel">Next:</b> | |
| 49 | <a class="sectref" rel="next" href="module-StringIO.html">4.6 StringIO </A> | |
| 50 | </div> | |
| 51 | <hr /></div> | |
| 52 | </DIV> | |
| 53 | <!--End of Navigation Panel--> | |
| 54 | ||
| 55 | <H1><A NAME="SECTION006500000000000000000"> | |
| 56 | 4.5 <tt class="module">fpformat</tt> -- | |
| 57 | Floating point conversions</A> | |
| 58 | </H1> | |
| 59 | ||
| 60 | <P> | |
| 61 | <A NAME="module-fpformat"></A> | |
| 62 | ||
| 63 | <P> | |
| 64 | The <tt class="module">fpformat</tt> module defines functions for dealing with | |
| 65 | floating point numbers representations in 100% pure | |
| 66 | Python. <span class="note"><b class="label">Note:</b> | |
| 67 | This module is unneeded: everything here could | |
| 68 | be done via the <code>%</code> string interpolation operator.</span> | |
| 69 | ||
| 70 | <P> | |
| 71 | The <tt class="module">fpformat</tt> module defines the following functions and an | |
| 72 | exception: | |
| 73 | ||
| 74 | <P> | |
| 75 | <dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline"> | |
| 76 | <td><nobr><b><tt id='l2h-950' xml:id='l2h-950' class="function">fix</tt></b>(</nobr></td> | |
| 77 | <td><var>x, digs</var>)</td></tr></table></dt> | |
| 78 | <dd> | |
| 79 | Format <var>x</var> as <code>[-]ddd.ddd</code> with <var>digs</var> digits after the | |
| 80 | point and at least one digit before. | |
| 81 | If <code><var>digs</var> <= 0</code>, the decimal point is suppressed. | |
| 82 | ||
| 83 | <P> | |
| 84 | <var>x</var> can be either a number or a string that looks like | |
| 85 | one. <var>digs</var> is an integer. | |
| 86 | ||
| 87 | <P> | |
| 88 | Return value is a string. | |
| 89 | </dl> | |
| 90 | ||
| 91 | <P> | |
| 92 | <dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline"> | |
| 93 | <td><nobr><b><tt id='l2h-951' xml:id='l2h-951' class="function">sci</tt></b>(</nobr></td> | |
| 94 | <td><var>x, digs</var>)</td></tr></table></dt> | |
| 95 | <dd> | |
| 96 | Format <var>x</var> as <code>[-]d.dddE[+-]ddd</code> with <var>digs</var> digits after the | |
| 97 | point and exactly one digit before. | |
| 98 | If <code><var>digs</var> <= 0</code>, one digit is kept and the point is suppressed. | |
| 99 | ||
| 100 | <P> | |
| 101 | <var>x</var> can be either a real number, or a string that looks like | |
| 102 | one. <var>digs</var> is an integer. | |
| 103 | ||
| 104 | <P> | |
| 105 | Return value is a string. | |
| 106 | </dl> | |
| 107 | ||
| 108 | <P> | |
| 109 | <dl><dt><b><span class="typelabel">exception</span> <tt id='l2h-952' xml:id='l2h-952' class="exception">NotANumber</tt></b></dt> | |
| 110 | <dd> | |
| 111 | Exception raised when a string passed to <tt class="function">fix()</tt> or | |
| 112 | <tt class="function">sci()</tt> as the <var>x</var> parameter does not look like a number. | |
| 113 | This is a subclass of <tt class="exception">ValueError</tt> when the standard | |
| 114 | exceptions are strings. The exception value is the improperly | |
| 115 | formatted string that caused the exception to be raised. | |
| 116 | </dd></dl> | |
| 117 | ||
| 118 | <P> | |
| 119 | Example: | |
| 120 | ||
| 121 | <P> | |
| 122 | <div class="verbatim"><pre> | |
| 123 | >>> import fpformat | |
| 124 | >>> fpformat.fix(1.23, 1) | |
| 125 | '1.2' | |
| 126 | </pre></div> | |
| 127 | ||
| 128 | <DIV CLASS="navigation"> | |
| 129 | <div class='online-navigation'> | |
| 130 | <p></p><hr /> | |
| 131 | <table align="center" width="100%" cellpadding="0" cellspacing="2"> | |
| 132 | <tr> | |
| 133 | <td class='online-navigation'><a rel="prev" title="4.4.4 Differ Example" | |
| 134 | href="differ-examples.html"><img src='../icons/previous.png' | |
| 135 | border='0' height='32' alt='Previous Page' width='32' /></A></td> | |
| 136 | <td class='online-navigation'><a rel="parent" title="4. String Services" | |
| 137 | href="strings.html"><img src='../icons/up.png' | |
| 138 | border='0' height='32' alt='Up One Level' width='32' /></A></td> | |
| 139 | <td class='online-navigation'><a rel="next" title="4.6 StringIO " | |
| 140 | href="module-StringIO.html"><img src='../icons/next.png' | |
| 141 | border='0' height='32' alt='Next Page' width='32' /></A></td> | |
| 142 | <td align="center" width="100%">Python Library Reference</td> | |
| 143 | <td class='online-navigation'><a rel="contents" title="Table of Contents" | |
| 144 | href="contents.html"><img src='../icons/contents.png' | |
| 145 | border='0' height='32' alt='Contents' width='32' /></A></td> | |
| 146 | <td class='online-navigation'><a href="modindex.html" title="Module Index"><img src='../icons/modules.png' | |
| 147 | border='0' height='32' alt='Module Index' width='32' /></a></td> | |
| 148 | <td class='online-navigation'><a rel="index" title="Index" | |
| 149 | href="genindex.html"><img src='../icons/index.png' | |
| 150 | border='0' height='32' alt='Index' width='32' /></A></td> | |
| 151 | </tr></table> | |
| 152 | <div class='online-navigation'> | |
| 153 | <b class="navlabel">Previous:</b> | |
| 154 | <a class="sectref" rel="prev" href="differ-examples.html">4.4.4 Differ Example</A> | |
| 155 | <b class="navlabel">Up:</b> | |
| 156 | <a class="sectref" rel="parent" href="strings.html">4. String Services</A> | |
| 157 | <b class="navlabel">Next:</b> | |
| 158 | <a class="sectref" rel="next" href="module-StringIO.html">4.6 StringIO </A> | |
| 159 | </div> | |
| 160 | </div> | |
| 161 | <hr /> | |
| 162 | <span class="release-info">Release 2.4.2, documentation updated on 28 September 2005.</span> | |
| 163 | </DIV> | |
| 164 | <!--End of Navigation Panel--> | |
| 165 | <ADDRESS> | |
| 166 | See <i><a href="about.html">About this document...</a></i> for information on suggesting changes. | |
| 167 | </ADDRESS> | |
| 168 | </BODY> | |
| 169 | </HTML> |