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1 py 3
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2
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3 Web 2.0
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4 =======
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5
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6 .. image:: web-2-0-logos.gif
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7 :height: 300 px
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8
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9 But first...
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10 ============
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11
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12 .. image:: sargon.jpg
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13 :height: 300 px
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14
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15 Sargon the Great founded the Akkadian Empire
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16 in the twenty-third century BC.
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17
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18 In between
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19 ==========
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20
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21 .. image:: apple.jpg
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22 :height: 300 px
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23
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24 Unlike the Akkadian Empire, the CLI will never disappear.
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25
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26 line-oriented command interpreter
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27 command-line interface
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28 text user interface
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29 terminal user interface
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30 console
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31 shell
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32
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33 Defining
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34 ========
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35
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36 Prompt accepts free text input
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37 Outputs lines of text
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38 CLI environment persists
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39
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40 Examples
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41 ========
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42
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43 Bash, Korn, zsh
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44 Python shell
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45 screen
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46 Zork
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47 ed
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48 SQL clients: psql, SQL*\Plus, mysql...
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49
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50 != Command Line Utilities
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51 =========================
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52
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53 Accept single set of arguments at
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54 invocation, execute, terminate
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55
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56 dir
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57 grep
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58 ping
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59
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60 sys.argv
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61 optparse
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62
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63 != Text User Interfaces
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64 =======================
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65
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66 ("console")
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67
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68 Use entire (session) screen
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69 Not line-by-line
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70
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71 .. image:: urwid.png
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72 :height: 300px
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73
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74 curses
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75 urwid
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76
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77
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78 foo a b c ->
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79 self.do_foo('a b c')
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80 self.default('foo a b c')
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81
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82 pirate.py
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83 =========
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84
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85 ::
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86
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87 from cmd import Cmd
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88
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89 class Pirate(Cmd):
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90 pass
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91
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92 pirate = Pirate()
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93 pirate.cmdloop()
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94
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95 history: cursor
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96 ctrl-r
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97 help
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98
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