12ùHelloPython
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>>>x=int(raw_input(\plzinputx:\plzinputx:12
>>>y=int(raw_input(\plzinputy:\plzinputy:13>>>z=x+y>>>printz25
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>>>x=input(\plzinputx:\plzinputx:12
>>>y=input(\plzinputy:\plzinputy:13.5>>>z=x+y>>>printz25.5
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>>>z=raw_input(’plzinputafloat:’)plzinputafloat:-12.45>>>printz’-12.45’
>>>w=float(z)>>>printw-12.45
m?oc.??udêe?eapj.www·?3wwinput?ê??LyX?\
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>>>x=input(’plzinputanint:’)
plzinputanint:1234>>>printx1234
>>>y=input(’plzinputafloat:’)plzinputafloat:-9.8765>>>printy
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2.3.PYTHON-SHELL?\~???
8
-9.8765
2.3Python-Shell?\~???
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>>>len=12>>>le
Traceback(mostrecentcalllast):
File\
NameError:name’le’isnotdefined>>>
t>Python-Shell?\NameError:name’le’isnotde?ned§′`’le’Ct???§??(Xd§???c·?D???′lenCt??u12§levkD?òvk??M??????vk????\
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>>>len=\www.jeapedu.com\>>>pint(len)
m?oc.??udêe?eapj.wwwTraceback(mostrecentcalllast):
File\
pint(len)NameError:name’pint’isnotdefined>>>
lt>IDLE-Shell?\NameError:name’pint’isnotde?ned,?±w?pint?êvk??§AT′?êprint?????ri1\
2.3.2??éi?
3python?é?-p?\\???????é??i?§Non)o'X3print?êcv????(??)????U??TAB…§????—3Python-Shellp$1?é??y??\
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>>>s=’www.jeapedu.com’>>>prints
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12ùHelloPython
345678910
www.jeapedu.com>>>prints
File\
IndentationError:unexpectedindent>>>
141???????3u§print?êck??TAB??eZ???§??—3Shellp?{?ü5??????\
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1??k????$1Python§S???{o2??PythonIO￥¤3??81o
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m?oc.??udêe?eapj.www16c?ê???Copyright??
13ù.Ct??ê
3.1Ct?:
Ct′?§?óp-??????Vg§3?ap??óp?^Ct5“L??S???§,???ù???p?;??-a.§q????Uq???;¤??’c’,??′duT?S?p????±‘?u)Cz§·???ù?“LS??????ò?Ct\
3.1.1Ct???
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>>>x=12>>>printx12
>>>x=13.09>>>printx
m?oc.??udêe?eapj.www13.09
>>>x=\a1309b\>>>printx’a1309b’
lt>??§S?±w?D??Python?'%Ctx??êaa.′?o§?SLC?ó??mu?????§C5?Ct??a.′?????????????êaS???§??Python??Ct????Cta.§@oéu?????êaNoU?;??eQoe?·?2w????§S`2?e??Python?I???Ct??a.??±”?;”e???Yêa??\
123
>>>x=12>>>type(x)
17
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>>>x=’12’>>>type(x)
>>>x=’12.0300203000404’>>>type(x)
5μtype?ê′?￡)òpL?a???êaa.
t>“èx???O??D???ê12§i?G-12.§2:.êa12.03§??′?vkˉK§?U??(‰1§???%?XJêaé?U?eo(????4!8i!)o·?w?ee???§S§5???ePython??CtúC?ó??Ct??.k=???óo
123456789101112131415161718
>>>x=12>>>id(x)10416516>>>x=13>>>id(x)10416504
>>>x=’12’>>>id(x)19428056>>>y=’12’>>>id(y)19428056>>>y=13>>>id(y)10416504>>>y=12>>>id(y)10416516
m?oc.??udêe?eapj.www5μid?ê′?￡)òpObject3S?p??/?§???g1^id?????S?
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10416516ú10416516!10416504?y?g\
1234
>>>help(id)
Helponbuilt-infunctionidinmodule__builtin__:id(...)
id(object)->integer
18
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python基础教程（自编精品）
