Hi, I need to read multiple folders and read the .tif files and hold it a rasterlist. I have mycode below but it holds only last year tif. files. Can somebody help me to read all the .tif files and hold in the raster list. ? Thanks in advance. Please see my code below: years = [ 1981 , 1982 , 1983 ] for year in years : lstFiles = [ ] arcpy . env . workspace = r 'H:\PRISM_800m_weekly_sum' + "\\" + str ( year ) lstFiles = arcpy . ListRasters ( "*" , "TIF" ) for raster in lstFiles : print ( raster ) lstFiles . sort ( ) >> > lstFiles [ u 'Week_1_Sum1983_10.tif' , u 'Week_1_Sum1983_11.tif' , u 'Week_1_Sum1983_9.tif' , u 'Week_2_Sum1983_10.tif' , u 'Week_2_Sum1983_11.tif' , u 'Week_2_Sum1983_9.tif' , u 'Week_3_Sum1983_10.tif' , u 'Week_3_Sum1983_11.tif' , u 'Week_3_Sum1983_9.tif' , u 'Week_4_Sum1983_10.tif' , u 'Week_4_Sum1983_11.tif' , u 'Week_4_Sum1983_9.tif' , u 'Week_5_Sum1983_10.tif' , u 'Week_5_Sum1983_11.tif' , u 'Week_5_Sum1983_9.tif' ]

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Create raster list by reading .tif files in multiple folders

DuminduJayasekera

Hi,

I need to read multiple folders and read the .tif files and hold it a rasterlist. I have mycode below but it holds only last year tif. files.

Can somebody help me to read all the .tif files and hold in the raster list. ?

Thanks in advance.

Please see my code below:

years <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN><SPAN class="number token">1981</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="number token">1982</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="number token">1983</SPAN><SPAN class="punctuation token">]</SPAN>
<SPAN class="keyword token">for</SPAN> year <SPAN class="keyword token">in</SPAN> years<SPAN class="punctuation token">:</SPAN>
lstFiles <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN><SPAN class="punctuation token">]</SPAN> 
 arcpy<SPAN class="punctuation token">.</SPAN>env<SPAN class="punctuation token">.</SPAN>workspace <SPAN class="operator token">=</SPAN> r<SPAN class="string token">'H:\PRISM_800m_weekly_sum'</SPAN> <SPAN class="operator token">+</SPAN> <SPAN class="string token">"\\"</SPAN> <SPAN class="operator token">+</SPAN> str<SPAN class="punctuation token">(</SPAN>year<SPAN class="punctuation token">)</SPAN>
 lstFiles <SPAN class="operator token">=</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>ListRasters<SPAN class="punctuation token">(</SPAN><SPAN class="string token">"*"</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="string token">"TIF"</SPAN><SPAN class="punctuation token">)</SPAN>
 <SPAN class="keyword token">for</SPAN> raster <SPAN class="keyword token">in</SPAN> lstFiles<SPAN class="punctuation token">:</SPAN>
 <SPAN class="keyword token">print</SPAN><SPAN class="punctuation token">(</SPAN>raster<SPAN class="punctuation token">)</SPAN>
 lstFiles<SPAN class="punctuation token">.</SPAN>sort<SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN>‍‍‍‍‍‍‍‍


<SPAN class="operator token">>></SPAN><SPAN class="operator token">></SPAN> lstFiles
<SPAN class="punctuation token">[</SPAN>u<SPAN class="string token">'Week_1_Sum1983_10.tif'</SPAN><SPAN class="punctuation token">,</SPAN> u<SPAN class="string token">'Week_1_Sum1983_11.tif'</SPAN><SPAN class="punctuation token">,</SPAN> u<SPAN class="string token">'Week_1_Sum1983_9.tif'</SPAN><SPAN class="punctuation token">,</SPAN> u<SPAN class="string token">'Week_2_Sum1983_10.tif'</SPAN><SPAN class="punctuation token">,</SPAN> u<SPAN class="string token">'Week_2_Sum1983_11.tif'</SPAN><SPAN class="punctuation token">,</SPAN> u<SPAN class="string token">'Week_2_Sum1983_9.tif'</SPAN><SPAN class="punctuation token">,</SPAN> u<SPAN class="string token">'Week_3_Sum1983_10.tif'</SPAN><SPAN class="punctuation token">,</SPAN> u<SPAN class="string token">'Week_3_Sum1983_11.tif'</SPAN><SPAN class="punctuation token">,</SPAN> u<SPAN class="string token">'Week_3_Sum1983_9.tif'</SPAN><SPAN class="punctuation token">,</SPAN> u<SPAN class="string token">'Week_4_Sum1983_10.tif'</SPAN><SPAN class="punctuation token">,</SPAN> u<SPAN class="string token">'Week_4_Sum1983_11.tif'</SPAN><SPAN class="punctuation token">,</SPAN> u<SPAN class="string token">'Week_4_Sum1983_9.tif'</SPAN><SPAN class="punctuation token">,</SPAN> u<SPAN class="string token">'Week_5_Sum1983_10.tif'</SPAN><SPAN class="punctuation token">,</SPAN> u<SPAN class="string token">'Week_5_Sum1983_11.tif'</SPAN><SPAN class="punctuation token">,</SPAN> u<SPAN class="string token">'Week_5_Sum1983_9.tif'</SPAN><SPAN class="punctuation token">]</SPAN>
‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍<SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

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Accepted answers

DanPatterson_Retired

I am not sure where you are running this, but your code above is not formatted correctly... so that could be the problem.

Indentation is critical, the preferred indent is 4 spaces... don't use tabs.

You have 3 sequential four loops beginning on line 4. Line 5 is marginally indented, line 6 is improperly indented etc

Don't be afraid of using print statements. You need to put some print statements until you become python sentient to ensure what you think is happening is actually happening.

And lastly, your original question is spreading. Close one question, then proceed to the next. I am anticipating that this question isn't quite over yet

All comments

DanPatterson_Retired

Cant actually check the code, but you were overwriting your lstFiles list... you want to extend it with the new values found in the new folder designated by the year.

years <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN><SPAN class="number token">1981</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="number token">1982</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="number token">1983</SPAN><SPAN class="punctuation token">]</SPAN>
lstFiles <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN><SPAN class="punctuation token">]</SPAN>
<SPAN class="keyword token">for</SPAN> year <SPAN class="keyword token">in</SPAN> years<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp; arcpy<SPAN class="punctuation token">.</SPAN>env<SPAN class="punctuation token">.</SPAN>workspace <SPAN class="operator token">=</SPAN> r<SPAN class="string token">'H:\PRISM_800m_weekly_sum'</SPAN> <SPAN class="operator token">+</SPAN> <SPAN class="string token">"\\"</SPAN> <SPAN class="operator token">+</SPAN> str<SPAN class="punctuation token">(</SPAN>year<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp; newfiles <SPAN class="operator token">=</SPAN> arcpy<SPAN class="punctuation token">.</SPAN>ListRasters<SPAN class="punctuation token">(</SPAN><SPAN class="string token">"*"</SPAN><SPAN class="punctuation token">,</SPAN><SPAN class="string token">"TIF"</SPAN><SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp; lstFiles<SPAN class="punctuation token">.</SPAN>extend<SPAN class="punctuation token">(</SPAN>newfiles<SPAN class="punctuation token">)</SPAN><SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

DuminduJayasekera

Thanks a bunch Dan. It helps. New to python and learning day by day.

DanPatterson_Retired

no problem... keep at it

DuminduJayasekera

Dan,

Now I need to read files from the above list "lstFiles". For example, I need to read and store rasters from the "lstFiles" and store in a different raster list. My code below print all the files I need to store but how can I store the below list in a raster list.

Thanks again.

week=5
month=10

for file in lstFiles:
&nbsp; &nbsp; if fnmatch.fnmatch(file, 'Week_' + str(week) + '_*_' + str(month) + '.tif'):
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; print (file)

Week_5_Sum1981_10.tif
Week_5_Sum1982_10.tif
Week_5_Sum1983_10.tif
Week_5_Sum1984_10.tif
Week_5_Sum1985_10.tif
Week_5_Sum1986_10.tif
Week_5_Sum1987_10.tif
Week_5_Sum1988_10.tif
Week_5_Sum1989_10.tif
Week_5_Sum1990_10.tif
Week_5_Sum1991_10.tif
Week_5_Sum1992_10.tif
Week_5_Sum1993_10.tif
Week_5_Sum1994_10.tif
Week_5_Sum1995_10.tif
Week_5_Sum1996_10.tif
Week_5_Sum1997_10.tif
Week_5_Sum1998_10.tif
Week_5_Sum1999_10.tif
Week_5_Sum2000_10.tif
Week_5_Sum2001_10.tif
Week_5_Sum2002_10.tif
Week_5_Sum2003_10.tif
Week_5_Sum2004_10.tif
Week_5_Sum2005_10.tif
Week_5_Sum2006_10.tif
Week_5_Sum2007_10.tif
Week_5_Sum2008_10.tif
Week_5_Sum2009_10.tif
Week_5_Sum2010_10.tif
Week_5_Sum2011_10.tif
Week_5_Sum2012_10.tif
Week_5_Sum2013_10.tif
Week_5_Sum2014_10.tif
Week_5_Sum2015_10.tif
Week_5_Sum2016_10.tif
<SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

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