how to determine an integer in a string list

Question

i have a problem if i have a string list

for example :

token=[aaa,bbb,ccc,ddd,0,eee,40,ggg,5]

how can i do to check whether token[i] is an integer

i want to see if token[i] is integer

i will put it in to a new string list by i+1:number

ex if token[4]=0 i will put it into result[5]="5:0"

sorry for explain not clear first if i have many data ex 39, State-gov, 77516, Bachelors, 13, Never-married, Adm-clerical, Not-in-family, White, Male, 2174, 0, 40, United-States, <=50K 50, Self-emp-not-inc, 83311, Bachelors, 13, Married-civ-spouse, Exec-managerial, Husband, White, Male, 0, 0, 13, United-States, <=50K

second i need to convert those data into specific number ex State-gov into 2:1 Self-emp-not-inc into 2:2

however i can convert string into number but i cannot convert number into number ex if token[4]=0 i will put it into result[5]="5:0"

for line in lines:
    token=re.split(', ',line)

  for i in range(0,13,1):
    try:
        value = int(token[i])

    except ValueError:
        pass  
    if (token[14] in '<=50K.'):
        result.append('1')
    if (token[14] in '>50K.'):
        result[j].append('2')
    if (value == true):
        result.append('i+1:token[i]')
    if (token[i] in '?'):
        result.append('i+1:0')
    if(token[i] in 'State-gov'):
        result.append("2:1")
    if(token[i] in 'Self-emp-not-inc'):
        result.append('2:2')

I agreed 100%, this is a totally different question. At first I thought, "What, is it really possible that Python is so lame that all the elements of an array have to be of the same type, like original BASIC??!" That's the only way I could explain why someone would think a question asking how to determine if an array element is an integer is the same question as how to check if a string can be represented by a number. Thankfully, [it's not](http://stackoverflow.com/q/11387752/1248365). I'm voting to reopen. — Adi Inbar, Nov 20 '14 at 04:16

score 0 · Answer 1 · answered Nov 15 '14 at 08:53

0

the function type, returns the type of the object

>>> type(10)
<type 'int'>
>>> type("10")
<type 'str'>

answered Nov 15 '14 at 08:53

theAlse

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The OP specifies a list of strings. Also, `isinstance` is generally preferred to `type`. – jonrsharpe Nov 15 '14 at 08:57
can you explain simplely i am a new come to python Q – jackson Nov 15 '14 at 09:00

score 0 · Answer 2 · answered Nov 15 '14 at 08:54

0

>>> "13".isdigit()
True
>>>

answered Nov 15 '14 at 08:54

ghostdog74

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score 0 · Accepted Answer · answered Nov 15 '14 at 08:59

0

You need to use isinstance if you want to check the type of entry , and if you have multitype elements in your list :

>>> token=['aaa','bbb','ccc','ddd',0,'eee',40,'ggg',5]
>>> ["{}:{}".format(i,j) for i,j in enumerate(token,1) if isinstance(j,int)]
['5:0', '7:40', '9:5']

answered Nov 15 '14 at 08:59

Mazdak

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but i stll need to convert aaa----->1:1 for example – jackson Nov 15 '14 at 09:01
@jackson whay ? it doesn't contain any digit ? – Mazdak Nov 15 '14 at 09:02
i am try to do data mining i have to convert some information in to number ex: U.S.A----->10:1 – jackson Nov 15 '14 at 09:05
so based on what logic ? also you didn't speak about string in your question 1!!! – Mazdak Nov 15 '14 at 09:06
so i do this if(token[i] in 'State-gov'): result.append("2:1") if the data is string not number – jackson Nov 15 '14 at 09:06
based on whatever i choose the number i can set randomly ex U.S.A---->10:1 Taipei----->10:2 – jackson Nov 15 '14 at 09:07
@jackson randomly what ?? pleaaaaaase add a clear explain to your question ! – Mazdak Nov 15 '14 at 09:20
@jackson i though your question is not duplicated and i gave you +1 , if you want get a good answer , you need to say clearly what you want , also if until now you find my answer useful you can tell this to community by voting ! – Mazdak Nov 15 '14 at 09:24
＠Kasra i explain again can u help me plzQQ – jackson Nov 15 '14 at 13:19

how to determine an integer in a string list

3 Answers3