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courses:be5b33prg:homeworks:spam:step1 [2015/10/15 14:47]
xposik [Preparation] 		courses:be5b33prg:homeworks:spam:step1 [2015/11/26 09:12]
xposik
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 =====Preparation===== =====Preparation=====
  
-++++ Working with a //dictionary// |+++++ Working with a dictionary |
   * See {[a4b99rph:​Pilgrim2009]},​ chapter [[http://​www.diveinto.org/​python3/​native-datatypes.html#​dictionaries|2.7]],​ or {[a4b99rph:​Wentworth2012]},​ chapter [[http://​openbookproject.net/​thinkcs/​python/​english3e/​dictionaries.html|20]]).   * See {[a4b99rph:​Pilgrim2009]},​ chapter [[http://​www.diveinto.org/​python3/​native-datatypes.html#​dictionaries|2.7]],​ or {[a4b99rph:​Wentworth2012]},​ chapter [[http://​openbookproject.net/​thinkcs/​python/​english3e/​dictionaries.html|20]]).
   * How to create an empty dictionary.   * How to create an empty dictionary.
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 </​code>​ </​code>​
 ++++ ++++
-++++Working with (text) files|+ 
 +++++ Working with (text) files |
   *(viz {[a4b99rph:​Pilgrim2009]},​ chapter [[http://​diveinto.org/​python3/​files.html|11]],​ or {[a4b99rph:​Wentworth2012]},​ chapter [[http://​openbookproject.net/​thinkcs/​python/​english3e/​files.html|13]]).   *(viz {[a4b99rph:​Pilgrim2009]},​ chapter [[http://​diveinto.org/​python3/​files.html|11]],​ or {[a4b99rph:​Wentworth2012]},​ chapter [[http://​openbookproject.net/​thinkcs/​python/​english3e/​files.html|13]]).
   * How to open and close a text file.   * How to open and close a text file.
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   * Reading a file line by line.   * Reading a file line by line.
   * Reading the whole file contents as a single string.   * Reading the whole file contents as a single string.
-++++The usage of section ​<​code>​if __name__ == "​__main__":​</​code>​|+++++ 
 + 
 +++++ The usage of section ​''​if __name__ == "​__main__":​'' ​|
   * See {[a4b99rph:​Pilgrim2009]},​ chapter [[http://​diveinto.org/​python3/​your-first-python-program.html#​runningscripts|1.10]]).   * See {[a4b99rph:​Pilgrim2009]},​ chapter [[http://​diveinto.org/​python3/​your-first-python-program.html#​runningscripts|1.10]]).
 ++++ ++++
-++++Method ''​split()''​ of string values|+ 
 +++++ Method ''​split()''​ of string values |
   * See the Python docs for [[http://​docs.python.org/​py3k/​library/​stdtypes.html?​highlight=split#​str.split|str.split()]])   * See the Python docs for [[http://​docs.python.org/​py3k/​library/​stdtypes.html?​highlight=split#​str.split|str.split()]])
 ++++ ++++
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 > {{page>​courses:​a4b99rph:​internal:​cviceni:​spam:​tyden07#​read_classification_from_file&​editbtn}} > {{page>​courses:​a4b99rph:​internal:​cviceni:​spam:​tyden07#​read_classification_from_file&​editbtn}}
 +
 +
 +===== Writing classification (predictions) to a file =====
 +
 +Task:
 +  * In module ''​utils.py'',​ create function ''​write_classification_to_file()''​ that will write the (usually predicted) mail classes to a text file.
 +
 +Why do we need it:
 +  * The function will come handy when writing the filter; it can be used to create the ''​!prediction.txt''​ file. 
 +
 +==== Specifications ====
 +Function ''​write_classification_to_file()''​ (in module ''​utils.py''​) should conform to the following specifications: ​
 +
 +^ ''​write_classification_to_file(cls_dict,​ fpath)''​ ^^
 +^  Inputs ​ | (1) dictionary containing the email file names as keys, and email classes (''​SPAM''​ or ''​OK''​) as values.
 +^          | (2) The path to the text file that shall be created. ​ |
 +^  Output ​ | None.  |
 +
 +The following code
 +
 +<code python>
 +>>>​ cls_dict = {'​email1234':​ '​OK',​ '​email03':​ '​SPAM',​ '​email02':​ '​OK',​ '​email01':​ '​OK'​}
 +>>>​ fpath = '​1/​!prediction.txt'​
 +>>>​ write_classification_to_file(cls_dict,​ fpath)
 +</​code>​
 +
 +shall create file ''​!prediction.txt''​ in directory ''​1''​ (the directory must exist) with the following contents:
 +
 +<​code>​
 +email01 OK
 +email02 OK
 +email03 SPAM
 +email1234 OK
 +</​code>​
 +
 +The actual order of individual rows in the file is not important.
 +
 +If the ''​cls_dict''​ is empty, the function shall create an empty file.
 +
  
courses/be5b33prg/homeworks/spam/step1.txt · Last modified: 2015/11/30 15:29 by xposik