Python lesson First day notes-la

http://www.cnblogs.com/onda/ ----------------------201,704,231: Cpython  pypy difference, etc.; Cpython is a one-line explanation, PyPy is the whole file explanation two: Pycharm use:        1: Create project         2: Set character sets utf8        3: Set default Create file   start   #!/usr/bin/env python   and UTF8 read         4: Modify Mouse wheel (Ctrl) to modify text size   in setting   search mous three: input and output: Inputs  print  Four: variables:        1: Letters, numbers (cannot start), underscores         2: cannot be a python default string         3: Conform to popular thinking, split five with underscore: Comment, single line #   multiline '   ' Six: Format (indent): Pycharm is the tab (4 spaces) used. Seven: If judgment:     If condition:                        expression                     elif conditions:              &N Bsp         expressions                     else:    &N Bsp &nBsp                 expression eight: Loop         1:  while   expression: &nbs p; (Expression-->true   Enter loop)                 expression         &NB Sp       Continue jump out of the loop                 break   jump out of the loop          2  for  i (loop body)  in  range (Ten)   by loop body:          &NBS P     expression   Nine: Data type:    1 integer int    2 Bohr bool    3 string str 10: Other:    1: Remove empty on edge White  strip ()  lstrip ()     2: Split Split (' delimiter ')   default is space     3: Length  len     4: Index strings and lists are ordered by a= ' AB '   a[0]   print out "a"     5: Slices and indexes are similar, not only can you specify a location, you can also specify a section of a[0:2]     11: List  A=[]         convert strings to lists with list, whereas str#### #列表的方法A. Index (' value ') to find the position of the value  a.append (' Value ')     --> Append value a.count (' value ')     --> count, number of a.extend (' list ') of a value      --> Merge List A.index ()     --> View value location A.insert (position, ' value ')     --> Insert A.pop ()         --> Delete last A.remove ()     --> Delete the specified a.reverse ()     --> Flip List a.sort ()     --> sort 12: Dictionary   b={' key ': value}        value can be   dictionary, list, tuple   etc a= (' A ', ' B ', ' C ') # # #方法只有俩个index       Find location count     number of units to find ########## #元组和列表   convert tuple (list)      Turn list into tuple list (tuple)      turn tuple into List 13: IO file     Open: f=file (' 1.txt ', ' R ')             F.read ()             F.close ()     write: W=file (' 1.txt ', ' W ') &nbsp ;           W.write ()             W.close ()  

Python lesson First day notes-la