# Sample Python code.
# Goal
# We want to create a website with small,medium, large and extra large versions of the same pictures
# and HTML files to fit the medium,large,extra large. One picture per HTML file.
# The Large or Extra large category maybe optional. This explains the Use_large and Use_extra_large globals.
# There is a directory for each size : They are called "s","m","l","xl". Each directory contains both
# jpeg files and HTML files, except for "s" which contains no HTML files.
# There is a master HTML file (index.htm) which contains the thumbnails and links to the "m" files,
# which in turn contain links to the "L" files
# which in turn contain references to the "XL" files.
# The script below generates the HTML files only.
# You have to make sure the directories exist in the first place. These are relative to the current working directory.
import sys # We may call on sys.exit
import os # We call on os.stat, os.access
#Mnemonics for message languages
French=1
English=2
# Configuration section
Use_large = 0
Use_extra_large = 1
Language = French
# This should work on Windoze
FileSep = "/" #File directory separator
# End configuration section
if Language == French:
ClickMessage="Cliquez sur l'image pour voir une image plus grande."
FileSizeMessage1="Taille de l'image agrandie est "
FileSizeMessage2=" Octets"
elif Language == English :
ClickMessage="Click on the picture to see a larger version."
FileSizeMessage1="Size of the next picture is "
FileSizeMessage2=" Bytes"
# Just for testing:
sample_dictionary = {"pic1.jpg":"Tower of London","pic2.jpg":"Buckingham Palace","pic3.jpg":"Kew gardens"}
# dict2htlml creates a whole lot of files given
# a dictionary associating filenames with textual descriptions.
# Each file produced
# contains just one picture and the description from the dictionary. The page title is put into the title bar
# An appropriate dictionary might be sample_dictionary
def dict2html( picture_dict, page_title):
keys = picture_dict.keys()
for key in keys:
key2html(key,picture_dict[key], page_title)
def key2html(picture_name,caption,page_title):
key2html2("m", picture_name, caption, page_title)
if Use_large:
key2html2("l", picture_name, caption, page_title)
if Use_extra_large:
key2html2("xl", picture_name, caption, page_title)
def key2html2(size_string, picture_name, caption, page_title):
filename = make_current_filename(size_string, picture_name)#MAKE A HTML FILENAME FROM PICTURE NAME
next_filename = make_linked_filename(size_string, picture_name)#MAKE NAME OF FILE LINKED TO THE HYPERLINK INSIDE
try: #STANDARD PYTHON ERROR HANDLING
outfile_descr = open(filename, "w")
except: #DISGRACEFUL EXIT
print "Cannot create", filename
sys.exit(1)
#NOW FILL IN THE FILE CONTENTS
outfile_descr.write("\n")
outfile_descr.write("\n")
outfile_descr.write("")
outfile_descr.write(page_title)
outfile_descr.write("\n")
outfile_descr.write("\n")
outfile_descr.write("\n")
outfile_descr.write("")
outfile_descr.write(picture_name)
outfile_descr.write("
\n")
outfile_descr.write('')
if next_filename <> "":
outfile_descr.write('')
outfile_descr.write('
outfile_descr.write(caption)
outfile_descr.write(')
')
if next_filename <> "":
outfile_descr.write('')
outfile_descr.write('
\n')
if next_filename <> "":
next_size_string = next_size(size_string)
outfile_descr.write(ClickMessage)
output_file_size(next_size_string, outfile_descr,picture_name)
outfile_descr.write('Home
\n')
outfile_descr.write("\n")
outfile_descr.write("\n")
outfile_descr.close()
def make_current_filename(size,picture_name):
pn_wo_extension = picture_name[:-4]
html_file_rel_path = size+FileSep+pn_wo_extension+".htm"
return html_file_rel_path
def make_linked_filename(size_string, picture_name):
size_string2 = next_size(size_string)
if size_string2 == "":
return ""
pn_wo_extension = picture_name[:-4]
html_file_rel_path = ".."+FileSep+size_string+FileSep+pn_wo_extension+".htm"
return html_file_rel_path
def output_file_size(size_string, outfile_descr,picture_name):
next_picture_filename = size_string + FileSep + picture_name
if not os.access(next_picture_filename,os.F_OK): #TEST EXISTENCE OF FILE
print "Warning: Image file",next_picture_filename,"does not exist"
return
stat_result = os.stat(next_picture_filename) #RETURNS MANY THINGS BUT WE ARE USING SIZE
outfile_descr.write(FileSizeMessage1)
outfile_descr.write(str(stat_result.st_size))#FILE SIZE CONVERTED TO STRING
outfile_descr.write(FileSizeMessage2)
#returns "" when there is no larger size
def next_size(size):
if size == "s":
return "m"
elif size == "m":
if Use_large:
return "l"
if Use_extra_large:
return "xl"
else: return ""
elif size == "l":
if Use_extra_large:
return "xl"
else:
return ""
else:
return ""
# Now the definitions are done: Execute thiS (TEST CODE)
dict2html(sample_dictionary, "Visit of Britain")