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#!/usr/bin/env python
#
# PrettyTable 0.5
# Copyright (c) 2009, Luke Maurits <luke@maurits.id.au>
# All rights reserved.
# With contributions from:
# * Chris Clark
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
# * The name of the author may not be used to endorse or promote products
# derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
import cgi
import copy
import cPickle
import sys
FRAME = 0
ALL = 1
NONE = 2
class PrettyTable:
def __init__(self, fields=None, caching=True, padding_width=1, left_padding=None, right_padding=None):
"""Return a new PrettyTable instance
Arguments:
fields - list or tuple of field names
caching - boolean value to turn string caching on/off
padding width - number of spaces between column lines and content"""
# Data
self.fields = []
if fields:
self.set_field_names(fields)
else:
self.widths = []
self.aligns = []
self.set_padding_width(padding_width)
self.rows = []
self.cache = {}
self.html_cache = {}
# Options
self.hrules = FRAME
self.caching = caching
self.padding_width = padding_width
self.left_padding = left_padding
self.right_padding = right_padding
self.vertical_char = "|"
self.horizontal_char = "-"
self.junction_char = "+"
def __getslice__(self, i, j):
"""Return a new PrettyTable whose data rows are a slice of this one's
Arguments:
i - beginning slice index
j - ending slice index"""
newtable = copy.deepcopy(self)
newtable.rows = self.rows[i:j]
return newtable
def __str__(self):
return self.get_string()
##############################
# ATTRIBUTE SETTERS #
##############################
def set_field_names(self, fields):
"""Set the names of the fields
Arguments:
fields - list or tuple of field names"""
# We *may* need to change the widths if this isn't the first time
# setting the field names. This could certainly be done more
# efficiently.
if self.fields:
self.widths = [len(field) for field in fields]
for row in self.rows:
for i in range(0,len(row)):
if len(unicode(row[i])) > self.widths[i]:
self.widths[i] = len(unicode(row[i]))
else:
self.widths = [len(field) for field in fields]
self.fields = fields
self.aligns = len(fields)*["c"]
self.cache = {}
self.html_cache = {}
def set_field_align(self, fieldname, align):
"""Set the alignment of a field by its fieldname
Arguments:
fieldname - name of the field whose alignment is to be changed
align - desired alignment - "l" for left, "c" for centre and "r" for right"""
if fieldname not in self.fields:
raise Exception("No field %s exists!" % fieldname)
if align not in ["l","c","r"]:
raise Exception("Alignment %s is invalid, use l, c or r!" % align)
self.aligns[self.fields.index(fieldname)] = align
self.cache = {}
self.html_cache = {}
def set_padding_width(self, padding_width):
"""Set the number of empty spaces between a column's edge and its content
Arguments:
padding_width - number of spaces, must be a positive integer"""
try:
assert int(padding_width) >= 0
except AssertionError:
raise Exception("Invalid value for padding_width: %s!" % unicode(padding_width))
self.padding_width = padding_width
self.cache = {}
self.html_cache = {}
def set_left_padding(self, left_padding):
"""Set the number of empty spaces between a column's left edge and its content
Arguments:
left_padding - number of spaces, must be a positive integer"""
try:
assert left_padding == None or int(left_padding) >= 0
except AssertionError:
raise Exception("Invalid value for left_padding: %s!" % unicode(left_padding))
self.left_padding = left_padding
self.cache = {}
self.html_cache = {}
def set_right_padding(self, right_padding):
"""Set the number of empty spaces between a column's right edge and its content
Arguments:
right_padding - number of spaces, must be a positive integer"""
try:
assert right_padding == None or int(right_padding) >= 0
except AssertionError:
raise Exception("Invalid value for right_padding: %s!" % unicode(right_padding))
self.right_padding = right_padding
self.cache = {}
self.html_cache = {}
def set_border_chars(self, vertical="|", horizontal="-", junction="+"):
"""Set the characters to use when drawing the table border
Arguments:
vertical - character used to draw a vertical line segment. Default is |
horizontal - character used to draw a horizontal line segment. Default is -
junction - character used to draw a line junction. Default is +"""
if len(vertical) > 1 or len(horizontal) > 1 or len(junction) > 1:
raise Exception("All border characters must be strings of length ONE!")
self.vertical_char = vertical
self.horizontal_char = horizontal
self.junction_char = junction
self.cache = {}
##############################
# DATA INPUT METHODS #
##############################
def add_row(self, row):
"""Add a row to the table
Arguments:
row - row of data, should be a list with as many elements as the table
has fields"""
if len(row) != len(self.fields):
raise Exception("Row has incorrect number of values, (actual) %d!=%d (expected)" %(len(row),len(self.fields)))
self.rows.append(row)
for i in range(0,len(row)):
if len(unicode(row[i])) > self.widths[i]:
self.widths[i] = len(unicode(row[i]))
self.html_cache = {}
def add_column(self, fieldname, column, align="c"):
"""Add a column to the table.
Arguments:
fieldname - name of the field to contain the new column of data
column - column of data, should be a list with as many elements as the
table has rows
align - desired alignment for this column - "l" for left, "c" for centre and "r" for right"""
if len(self.rows) in (0, len(column)):
if align not in ["l","c","r"]:
raise Exception("Alignment %s is invalid, use l, c or r!" % align)
self.fields.append(fieldname)
self.widths.append(len(fieldname))
self.aligns.append(align)
for i in range(0, len(column)):
if len(self.rows) < i+1:
self.rows.append([])
self.rows[i].append(column[i])
if len(unicode(column[i])) > self.widths[-1]:
self.widths[-1] = len(unicode(column[i]))
else:
raise Exception("Column length %d does not match number of rows %d!" % (len(column), len(self.rows)))
##############################
# MISC PRIVATE METHODS #
##############################
def _get_sorted_rows(self, start, end, sortby, reversesort):
# Sort rows using the "Decorate, Sort, Undecorate" (DSU) paradigm
rows = copy.deepcopy(self.rows[start:end])
sortindex = self.fields.index(sortby)
# Decorate
rows = [[row[sortindex]]+row for row in rows]
# Sort
rows.sort(reverse=reversesort)
# Undecorate
rows = [row[1:] for row in rows]
return rows
def _get_paddings(self):
if self.left_padding is not None:
lpad = self.left_padding
else:
lpad = self.padding_width
if self.right_padding is not None:
rpad = self.right_padding
else:
rpad = self.padding_width
return lpad, rpad
##############################
# ASCII PRINT/STRING METHODS #
##############################
def printt(self, start=0, end=None, fields=None, header=True, border=True, hrules=FRAME, sortby=None, reversesort=False):
"""Print table in current state to stdout.
Arguments:
start - index of first data row to include in output
end - index of last data row to include in output PLUS ONE (list slice style)
fields - names of fields (columns) to include
sortby - name of field to sort rows by
reversesort - True or False to sort in descending or ascending order
border - should be True or False to print or not print borders
hrules - controls printing of horizontal rules after each row. Allowed values: FRAME, ALL, NONE"""
print self.get_string(start, end, fields, header, border, hrules, sortby, reversesort)
def get_string(self, start=0, end=None, fields=None, header=True, border=True, hrules=FRAME, sortby=None, reversesort=False):
"""Return string representation of table in current state.
Arguments:
start - index of first data row to include in output
end - index of last data row to include in output PLUS ONE (list slice style)
fields - names of fields (columns) to include
sortby - name of field to sort rows by
reversesort - True or False to sort in descending or ascending order
border - should be True or False to print or not print borders
hrules - controls printing of horizontal rules after each row. Allowed values: FRAME, ALL, NONE"""
if self.caching:
key = cPickle.dumps((start, end, fields, header, border, hrules, sortby, reversesort))
if key in self.cache:
return self.cache[key]
hrule = hrules or self.hrules
bits = []
if not self.fields:
return ""
if not header:
# Recalculate widths - avoids tables with long field names but narrow data looking odd
old_widths = self.widths[:]
self.widths = [0]*len(self.fields)
for row in self.rows:
for i in range(0,len(row)):
if len(unicode(row[i])) > self.widths[i]:
self.widths[i] = len(unicode(row[i]))
if header:
bits.append(self._stringify_header(fields, border, hrules))
elif border and hrules != NONE:
bits.append(self._stringify_hrule(fields, border))
if sortby:
rows = self._get_sorted_rows(start, end, sortby, reversesort)
else:
rows = self.rows[start:end]
for row in rows:
bits.append(self._stringify_row(row, fields, border, hrule))
if border and not hrule:
bits.append(self._stringify_hrule(fields, border))
string = "\n".join(bits)
if self.caching:
self.cache[key] = string
if not header:
# Restore previous widths
self.widths = old_widths
for row in self.rows:
for i in range(0,len(row)):
if len(unicode(row[i])) > self.widths[i]:
self.widths[i] = len(unicode(row[i]))
return string
def _stringify_hrule(self, fields=None, border=True):
if not border:
return ""
lpad, rpad = self._get_paddings()
padding_width = lpad+rpad
bits = [self.junction_char]
for field, width in zip(self.fields, self.widths):
if fields and field not in fields:
continue
bits.append((width+padding_width)*self.horizontal_char)
bits.append(self.junction_char)
return "".join(bits)
def _stringify_header(self, fields=None, border=True, hrules=FRAME):
lpad, rpad = self._get_paddings()
bits = []
if border:
if hrules != NONE:
bits.append(self._stringify_hrule(fields, border))
bits.append("\n")
bits.append(self.vertical_char)
for field, width in zip(self.fields, self.widths):
if fields and field not in fields:
continue
bits.append(" " * lpad + field.center(width) + " " * rpad)
if border:
bits.append(self.vertical_char)
if border and hrules != NONE:
bits.append("\n")
bits.append(self._stringify_hrule(fields, border))
return "".join(bits)
def _stringify_row(self, row, fields=None, border=True, hrule=False):
lpad, rpad = self._get_paddings()
bits = []
if border:
bits.append(self.vertical_char)
for field, value, width, align in zip(self.fields, row, self.widths, self.aligns):
if fields and field not in fields:
continue
if align == "l":
bits.append(" " * lpad + unicode(value).ljust(width) + " " * rpad)
elif align == "r":
bits.append(" " * lpad + unicode(value).rjust(width) + " " * rpad)
else:
bits.append(" " * lpad + unicode(value).center(width) + " " * rpad)
if border:
bits.append(self.vertical_char)
if border and hrule == ALL:
bits.append("\n")
bits.append(self._stringify_hrule(fields, border))
return "".join(bits)
##############################
# HTML PRINT/STRING METHODS #
##############################
def print_html(self, start=0, end=None, fields=None, sortby=None, reversesort=False, format=True, header=True, border=True, hrules=FRAME, attributes=None):
"""Print HTML formatted version of table in current state to stdout.
Arguments:
start - index of first data row to include in output
end - index of last data row to include in output PLUS ONE (list slice style)
fields - names of fields (columns) to include
sortby - name of field to sort rows by
format - should be True or False to attempt to format alignmet, padding, etc. or not
header - should be True or False to print a header showing field names or not
border - should be True or False to print or not print borders
hrules - include horizontal rule after each row
attributes - dictionary of name/value pairs to include as HTML attributes in the <table> tag"""
print self.get_html_string(start, end, fields, sortby, reversesort, format, header, border, hrules, attributes)
def get_html_string(self, start=0, end=None, fields=None, sortby=None, reversesort=False, format=True, header=True, border=True, hrules=FRAME, attributes=None):
"""Return string representation of HTML formatted version of table in current state.
Arguments:
start - index of first data row to include in output
end - index of last data row to include in output PLUS ONE (list slice style)
fields - names of fields (columns) to include
sortby - name of
border - should be True or False to print or not print borders
format - should be True or False to attempt to format alignmet, padding, etc. or not
header - should be True or False to print a header showing field names or not
border - should be True or False to print or not print borders
hrules - include horizontal rule after each row
attributes - dictionary of name/value pairs to include as HTML attributes in the <table> tag"""
if self.caching:
key = cPickle.dumps((start, end, fields, format, header, border, hrules, sortby, reversesort, attributes))
if key in self.html_cache:
return self.html_cache[key]
if format:
tmp_html_func=self._get_formatted_html_string
else:
tmp_html_func=self._get_simple_html_string
string = tmp_html_func(start, end, fields, sortby, reversesort, header, border, hrules, attributes)
if self.caching:
self.html_cache[key] = string
return string
def _get_simple_html_string(self, start, end, fields, sortby, reversesort, header, border, hrules, attributes):
bits = []
# Slow but works
table_tag = '<table'
if border:
table_tag += ' border="1"'
if attributes:
for attr_name in attributes:
table_tag += ' %s="%s"' % (attr_name, attributes[attr_name])
table_tag += '>'
bits.append(table_tag)
# Headers
bits.append(" <tr>")
for field in self.fields:
if fields and field not in fields:
continue
bits.append(" <th>%s</th>" % cgi.escape(unicode(field)))
bits.append(" </tr>")
# Data
if sortby:
rows = self._get_sorted_rows(stard, end, sortby, reversesort)
else:
rows = self.rows
for row in self.rows:
bits.append(" <tr>")
for field, datum in zip(self.fields, row):
if fields and field not in fields:
continue
bits.append(" <td>%s</td>" % cgi.escape(unicode(datum)))
bits.append(" </tr>")
bits.append("</table>")
string = "\n".join(bits)
return string
def _get_formatted_html_string(self, start, end, fields, sortby, reversesort, header, border, hrules, attributes):
bits = []
# Slow but works
table_tag = '<table'
if border:
table_tag += ' border="1"'
if hrules == NONE:
table_tag += ' frame="vsides" rules="cols"'
if attributes:
for attr_name in attributes:
table_tag += ' %s="%s"' % (attr_name, attributes[attr_name])
table_tag += '>'
bits.append(table_tag)
# Headers
lpad, rpad = self._get_paddings()
if header:
bits.append(" <tr>")
for field in self.fields:
if fields and field not in fields:
continue
bits.append(" <th style=\"padding-left: %dem; padding-right: %dem; text-align: center\">%s</th>" % (lpad, rpad, cgi.escape(unicode(field))))
bits.append(" </tr>")
# Data
if sortby:
rows = self._get_sorted_rows(start, end, sortby, reversesort)
else:
rows = self.rows
for row in self.rows:
bits.append(" <tr>")
for field, align, datum in zip(self.fields, self.aligns, row):
if fields and field not in fields:
continue
if align == "l":
bits.append(" <td style=\"padding-left: %dem; padding-right: %dem; text-align: left\">%s</td>" % (lpad, rpad, cgi.escape(unicode(datum))))
elif align == "r":
bits.append(" <td style=\"padding-left: %dem; padding-right: %dem; text-align: right\">%s</td>" % (lpad, rpad, cgi.escape(unicode(datum))))
else:
bits.append(" <td style=\"padding-left: %dem; padding-right: %dem; text-align: center\">%s</td>" % (lpad, rpad, cgi.escape(unicode(datum))))
bits.append(" </tr>")
bits.append("</table>")
string = "\n".join(bits)
return string
def main():
x = PrettyTable(["City name", "Area", "Population", "Annual Rainfall"])
x.set_field_align("City name", "l") # Left align city names
x.add_row(["Adelaide",1295, 1158259, 600.5])
x.add_row(["Brisbane",5905, 1857594, 1146.4])
x.add_row(["Darwin", 112, 120900, 1714.7])
x.add_row(["Hobart", 1357, 205556, 619.5])
x.add_row(["Sydney", 2058, 4336374, 1214.8])
x.add_row(["Melbourne", 1566, 3806092, 646.9])
x.add_row(["Perth", 5386, 1554769, 869.4])
print x
if len(sys.argv) > 1 and sys.argv[1] == "test":
# This "test suite" is hideous and provides poor, arbitrary coverage.
# I'll replace it with some proper unit tests Sometime Soon (TM).
# Promise.
print "Testing field subset selection:"
x.printt(fields=["City name","Population"])
print "Testing row subset selection:"
x.printt(start=2, end=5)
print "Testing hrules settings:"
print "FRAME:"
x.printt(hrules=FRAME)
print "ALL:"
x.printt(hrules=ALL)
print "NONE:"
x.printt(hrules=NONE)
print "Testing lack of headers:"
x.printt(header=False)
x.printt(header=False, border=False)
print "Testing lack of borders:"
x.printt(border=False)
print "Testing sorting:"
x.printt(sortby="City name")
x.printt(sortby="Annual Rainfall")
x.printt(sortby="Annual Rainfall", reversesort=True)
print "Testing padding parameter:"
x.set_padding_width(0)
x.printt()
x.set_padding_width(5)
x.printt()
x.set_left_padding(5)
x.set_right_padding(0)
x.printt()
x.set_right_padding(20)
x.printt()
x.set_left_padding(None)
x.set_right_padding(None)
x.set_padding_width(2)
print "Testing changing characters"
x.set_border_chars("*","*","*")
x.printt()
x.set_border_chars("!","~","o")
x.printt()
x.set_border_chars("|","-","+")
print "Testing everything at once:"
x.printt(start=2, end=5, fields=["City name","Population"], border=False, hrules=True)
print "Rebuilding by columns:"
x = PrettyTable()
x.add_column("City name", ["Adelaide", "Brisbane", "Darwin", "Hobart", "Sydney", "Melbourne", "Perth"])
x.add_column("Area", [1295, 5905, 112, 1357, 2058, 1566, 5385])
x.add_column("Population", [1158259, 1857594, 120900, 205556, 4336374, 3806092, 1554769])
x.add_column("Annual Rainfall", [600.5, 1146.4, 1714.7, 619.5, 1214.8, 646.9, 869.4])
x.printt()
print "Testing HTML:"
x.print_html()
x.print_html(border=False)
x.print_html(border=True)
x.print_html(format=False)
x.print_html(attributes={"name": "table", "id": "table"})
if __name__ == "__main__":
main()