I'm trying to make a bar graph with the histogram data I get from the histogram.txt file after I run the scripts. How would I go about doing this?
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Code:
class TallySheet:
"""Manage tallies for a collection of values.
Values can either be from a consecutive range of integers, or a
consecutive sequence of characters from the alphabet.
"""
def __init__(self, minVal, maxVal):
"""Create an initially empty tally sheet.
minVal the minimum acceptable value for later insertion
maxVal the minimum acceptable value for later insertion
"""
self._minV = minVal
self._maxV = maxVal
maxIndex = self._toIndex(maxVal)
self._tallies = [0] * (maxIndex + 1) # a list of counters, each initially zero
def increment(self, val):
"""Increment the tally for the respective value.
raise a TypeError if the given value is not of the proper type
raise a ValueError if the given value is not within proper range
"""
ind = self._toIndex(val)
if not 0 <= ind < len(self._tallies):
raise ValueError('parameter '+str(val)+' out of range')
self._tallies[ind] += 1
def getCount(self, val):
"""Return the total number of current tallies for the given value.
raise a TypeError if the given value is not of the proper type
raise a ValueError if the given value is not within proper range
"""
ind = self._toIndex(val)
if not 0 <= ind < len(self._tallies):
raise ValueError('parameter '+str(val)+' out of range')
return self._tallies[ind]
def getTotalCount(self):
"""Return the total number of current tallies."""
return sum(self._tallies)
def _toIndex(self, val):
"""Convert from a native value to a legitimate index.
Return the resulting index (such that _minV is mapped to 0)
"""
try:
if isinstance(self._minV, str):
i = ord(val) - ord(self._minV)
else:
i = int( val - self._minV )
except TypeError:
raise TypeError('parameter '+str(val)+' of incorrect type')
return i
def writeTable(self, outfile):
"""Write a comprehensive table of results.
Report each value, the count for that value, and the percentage usage.
outfile an already open file with write access.
"""
outfile.write('Value Count Percent \n----- ------ -------\n')
total = max(self.getTotalCount(), 1) # avoid division by zero
for ind in range(len(self._tallies)):
label = self._makeLabel(ind)
count = self._tallies[ind]
pct = 100.0 * count / total
outfile.write('%s %6d %6.2f%%\n' % (label, count, pct))
def _makeLabel(self, ind):
"""Convert index to a string in native range."""
if isinstance(self._minV, int):
return '%5d' % (ind + self._minV)
else:
return ' %s ' % chr(ind + ord(self._minV))
def writeHistogram(self, output, source):
'''Using the information created within writeTable,
create a histogram that compiles the data from the source file
into groups of consecutive values.'''
histo = list()
text = source.read() # read the contents of the source file which in this case is tally.txt
text = text.split('\n') # split each line in the text
histo.append(text[0] + '\n')
histo.append(text[1] + '\n')
for line in text: # if there's a blank line, or a \n at the end of the file, delete it
if line == '':
text.remove(line)
numLines = len(text) # this will help set up how long the loops need to be that are upcoming
if numLines % 2 == 1: # if the number of lines is odd then the last line needs to be duplicated
text.append(text[numLines - 1])
for x in range(2, numLines, 2): # this loop splits each line into individual pieces then adds the parts together
j = text[x].split() # split the first line
k = text[x+1].split() # split the second line
label = j[0] + '-' + k[0] # the label is the first parts added together ie. 'a-b'
count = int(j[1]) + int(k[1]) # add the counts together
pct = float(j[2][:-1]) + float(k[2][:-1]) # add the percentages together
histo.append('%5s %6d %6.2f%%\n' % (label, count, pct)) # create the lines to be written and add them to histo list
for line in histo:
output.write(line) # as in writeTable, write a line to the output file
if __name__ == '__main__':
t = TallySheet('a', 'e')
for i in range(10):
t.increment('a')
if t.getCount('a') == 10:
print 'Test1: Success'
else:
print 'Test1: Failure'
for i in range(5):
t.increment('b')
if t.getCount('b') == 5:
print 'Test2: Success'
else:
print 'Test2: Failure'
for i in range(10):
t.increment('c')
if t.getCount('c') == 10:
print 'Test3: Success'
else:
print 'Test3: Failure'
for i in range(5):
t.increment('d')
if t.getCount('d') == 5:
print 'Test4: Success'
else:
print 'Test4: Failure'
if t.getTotalCount() == 30:
print 'Test5: Success'
else:
print 'Test5: Failure'
f = file('tally.txt', 'w')
t.writeTable(f)
f.close()
print "Please open and check tally.txt."
f2 = file('histogram.txt', 'w')
f = file('tally.txt', 'r')
t.writeHistogram(f2, f)
f2.close()
f.close()
print "Please open and check histogram.txt."
raw_input("Press the ENTER key to continue...")
Code:
from TallySheet import *
class TallySheetWithHist(TallySheet):
'''A modified TallySheet Class'''
def writeHistogram(self, output, source):
'''Using the information created within writeTable,
create a histogram that compiles the data from the source file
into groups of consecutive values.'''
histo = list()
text = source.read() # read the contents of the source file which in this case is tally.txt
text = text.split('\n') # split each line in the text
histo.append(text[0] + '\n')
histo.append(text[1] + '\n')
for line in text: # if there's a blank line, or a \n at the end of the file, delete it
if line == '':
text.remove(line)
numLines = len(text) # this will help set up how long the loops need to be that are upcoming
if numLines % 2 == 1: # if the number of lines is odd then the last line needs to be duplicated
text.append(text[numLines - 1])
for x in range(2, numLines, 2): # this loop splits each line into individual pieces then adds the parts together
j = text[x].split() # split the first line
k = text[x+1].split() # split the second line
label = j[0] + '-' + k[0] # the label is the first parts added together ie. 'a-b'
count = int(j[1]) + int(k[1]) # add the counts together
pct = float(j[2][:-1]) + float(k[2][:-1]) # add the percentages together
histo.append('%5s %6d %6.2f%%\n' % (label, count, pct)) # create the lines to be written and add them to histo list
for line in histo:
output.write(line) # as in writeTable, write a line to the output file
if __name__ == '__main__':
t = TallySheetWithHist('a', 'e')
for i in range(10):
t.increment('a')
if t.getCount('a') == 10:
print 'Test1: Success'
else:
print 'Test1: Failure'
for i in range(5):
t.increment('b')
if t.getCount('b') == 5:
print 'Test2: Success'
else:
print 'Test2: Failure'
for i in range(10):
t.increment('c')
if t.getCount('c') == 10:
print 'Test3: Success'
else:
print 'Test3: Failure'
for i in range(5):
t.increment('d')
if t.getCount('d') == 5:
print 'Test4: Success'
else:
print 'Test4: Failure'
if t.getTotalCount() == 30:
print 'Test5: Success'
else:
print 'Test5: Failure'
f = file('tally.txt', 'w')
t.writeTable(f)
f.close()
print "Please open and check tally.txt."
f2 = file('histogram.txt', 'w')
f = file('tally.txt', 'r')
t.writeHistogram(f2, f)
f2.close()
f.close()
print "Please open and check histogram.txt."
raw_input("Press the ENTER key to continue...")
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