Pytemp 0.4¶
Pytemp is a commandline temperature converter written in Python. You will need Python installed on your system to be able to run it.
Python can be obtained from https://www.python.org.
The program should be self explanitory, have a look at the source code. If you find any bugs then let me know. Suggestions on how to improve pytemp are welcome.
Python Highlight Example¶
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 | #!/usr/bin/python
#######################
# Python Temperature Converter - Author: Matthew Tunstall 2006
# -------------------------------------------------------------------------------
# Aim: To take a command line temperature value and convert it to another scale
# Usage: pytemp -c -f 24 #Convert 24 degrees C to F
#######################
# Copyright (C) 2006 Matthew Tunstall
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#######################
usage ="""
PyTemp - Python Temperature Converter
-------------------------------------
USAGE: pytemp.py [from units] [to units] [value]
Units:
------
-c or -C = Celsius
-f or -F = Fahrenheit
-k or -K = Kelvin
Example:
--------
To convert 20 Celsius to Fahrenheit
pytemp.py -c -f 20
"""
#######################
# Revision History
# ----------------
# 0.4 - Release Date [10/9/2006]
# 0.4 - Rewrite of codebase to clean and optimise
# 0.3 - Working bug free code
# 0.2 - Working code with some error checking
# 0.1 - Initial Code Outline
#######################
bugemail = "bugs@deltanova.co.uk # Email address for bug reports
import sys # To gain access to the argv command to access command line args.
error="""
Something unexpected has occured for this message to be displayed.
Please submit a bug report to: """ + bugemail +"\n"
#######################
def abort(x): # Abort routine to exit the program when error detected
print usage
print x
print "Application Terminating"
sys.exit()
#######################
# Calculation Definitions
#######################
def f2c(temp):
fromScale = "Fahrenheit"
toScale = "Celsius"
temp = temp - 32
x = 5.0/9.0
temp = temp*x
return temp, fromScale, toScale
#######################
def c2f(temp):
fromScale = "Celsius"
toScale = "Fahrenheit"
x = 9.0/5.0
temp = temp*x
temp = temp + 32
return temp, fromScale, toScale
#######################
def f2k(temp):
fromScale = "Fahrenheit"
toScale = "Kelvin"
x,y,z = f2c(temp) # y & z take the fromScale and toScale values returned by f2c()
x = x + 273.15
return x, fromScale, toScale
#######################
def c2k(temp):
fromScale = "Celsius"
toScale = "Kelvin"
temp = temp + 273.15
return temp, fromScale, toScale
#######################
def k2c(temp):
fromScale = "Kelvin"
toScale = "Celsius"
temp = temp - 273.15
return temp, fromScale, toScale
#######################
def k2f(temp):
fromScale = "Kelvin"
toScale = "Fahrenheit"
x,w,v = k2c(temp) #w & v take the fromScale and toScale values returned by k2c()
print x
y = 9.0/5.0
temp = (x*y)+32
return temp, fromScale, toScale
########################
# Conversion Calculations #
# ------------------------------------------------------------------------------#
# From To Fahrenheit To Celsius To Kelvin #
# Fahrenheit(F) F (F-32)*(5/9) (F-32)*(5/9)+273.15 #
# Celsius(C) (C*(9/5))+32 C C+273.15 #
# Kelvin(K) (K-273.15)*(9/5)+32 K-273.15 K #
########################
def getargs():
args = sys.argv[1:] # Get command line args but strip the first arg(the file name).
argtest = [] # An empty list. Compare with args to check for command line arguments
if (args == argtest):
abort("No arguments supplied")
else: # If Arguments found
numargs = len(args)
if (numargs == 3):
x = args
elif (numargs < 3):
abort("Too few arguments supplied.")
elif (numargs > 3):
abort("Too many arguments supplied.")
else:
abort(error)
return x
#######################
def lowerargs(args): # Take the arguments and convert to lowercase to aid processing.
b = []
for x in args:
x = x.lower()
b.append(x)
return b
#######################
def tofloat(x): # Attempt to convert the input to a float
try:
x = float(x)
except ValueError:
y = 0
else:
y = 1
return y
#######################
def validtest1(args):
pos =[] # Position log, allows us to see which arg(s) validated
for a in args:
pos.append(tofloat(a))
poschk = [0,0,1] # Indicates the ideal result, only the last arg will convert to a float
if poschk == pos:
args[2]=float(args[2]) # Make float conversion on last arg permanent
else:
abort("Invalid Set of Arguments")
return args
#######################
def validtest2(args):
argchk = ["-c","-f","-k"]
testlist = [] # Create a test list to compare with argchk
# Only the first two values need checking, we have already checked the third
testlist.append(args[0])
testlist.append(args[1])
if args[0]==args[1]:
abort("No point in converting to the same scale")
x = 0
for item in testlist:
if item in argchk:
x = x + 1
if x != 2:
abort("Invalid Set of Arguments")
#######################
def processargs(args):
if args[0] == '-c':
if args[1] == '-f':
temp,f,t = c2f(args[2])
else:
temp,f,t = c2k(args[2])
elif args[0] == '-f':
if args[1] == '-k':
temp,f,t = f2k(args[2])
else:
temp,f,t = f2c(args[2])
elif args[0] == '-k':
if args[1] == '-c':
temp,f,t = k2c(args[2])
else:
temp,f,t = k2f(args[2])
else:
abort("Ooops, something has gone wrong")
print str(args[2]) + ' ' + f + ' equals ' + str(temp) + " " + t
#######################
# Main Program Loop
args = getargs() #Get arguments from the command line
args=lowerargs(args) #Convert args to lowercase
args = validtest1(args)
#The program will abort from inside validtest2 if failed validation means it cannot proceed.
validtest2(args)
#Program will resume here if validtest2 passed.
processargs(args)
#######################
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