फ़ाइल के बजाय एक स्ट्रीम से जूलिया रीडटेबल

Question

क्या नेटवर्क यूआरएल से या runpipe बाहरी कमांड से टेबल पढ़ने का कोई तरीका है? ऐसा लगता है कि DataFrame.readtable केवल फ़ाइल से पढ़ने का समर्थन करता है।

आर में उदाहरण के लिए हम क्या कर सकते हैं:

df = read.table(url("http://example.com/data.txt")) 

x = read.table(pipe("zcat data.txt | sed /^#/d | cut -f '11-13'"), colClasses=c("integer","integer","integer"), fill=TRUE, row.names=NULL) 

Answer 1

using DataFrames, Requests 

julia> resp = get("https://data.cityofnewyork.us/api/views/kku6-nxdu/rows.csv?accessType=DOWNLOAD") 
Response(200 OK, 17 headers, 27350 bytes in body) 

julia> tbl = readtable(IOBuffer(resp.data)); 

julia> names(tbl) 
46-element Array{Symbol,1}: 
:JURISDICTION_NAME     
:COUNT_PARTICIPANTS     
:COUNT_FEMALE      
:PERCENT_FEMALE      
:COUNT_MALE       
:PERCENT_MALE      
:COUNT_GENDER_UNKNOWN    
:PERCENT_GENDER_UNKNOWN    
:COUNT_GENDER_TOTAL     
:PERCENT_GENDER_TOTAL    
:COUNT_PACIFIC_ISLANDER    
:PERCENT_PACIFIC_ISLANDER   
:COUNT_HISPANIC_LATINO    
:PERCENT_HISPANIC_LATINO    
:COUNT_AMERICAN_INDIAN    
:PERCENT_AMERICAN_INDIAN    
:COUNT_ASIAN_NON_HISPANIC   
⋮         
:PERCENT_PERMANENT_RESIDENT_ALIEN 
:COUNT_US_CITIZEN     
:PERCENT_US_CITIZEN     
:COUNT_OTHER_CITIZEN_STATUS   
:PERCENT_OTHER_CITIZEN_STATUS  
:COUNT_CITIZEN_STATUS_UNKNOWN  
:PERCENT_CITIZEN_STATUS_UNKNOWN  
:COUNT_CITIZEN_STATUS_TOTAL   
:PERCENT_CITIZEN_STATUS_TOTAL  
:COUNT_RECEIVES_PUBLIC_ASSISTANCE 
:PERCENT_RECEIVES_PUBLIC_ASSISTANCE 
:COUNT_NRECEIVES_PUBLIC_ASSISTANCE 
:PERCENT_NRECEIVES_PUBLIC_ASSISTANCE 
:COUNT_PUBLIC_ASSISTANCE_UNKNOWN  
:PERCENT_PUBLIC_ASSISTANCE_UNKNOWN 
:COUNT_PUBLIC_ASSISTANCE_TOTAL  
:PERCENT_PUBLIC_ASSISTANCE_TOTAL 

julia> eltypes(tbl) 
46-element Array{Type,1}: 
Int64 
Int64 
Int64 
Float64 
Int64 
Float64 
Int64 
Int64 
Int64 
Int64 
Int64 
Float64 
Int64 
Float64 
Int64 
Float64 
Int64 
⋮  
Float64 
Int64 
Float64 
Int64 
Float64 
Int64 
Int64 
Int64 
Int64 
Int64 
Float64 
Int64 
Float64 
Int64 
Int64 
Int64 
Int64