我有一个包含 5 个文本文件的文件夹,这些文件与各个站点有关——
标题格式如下:
Rockspring_18_SW.417712.WRFc36.ET.2000-2050.txt
Rockspring_18_SW.417712.WRFc36.RAIN.2000-2050.txt
WICA.399347.WRFc36.ET.2000-2050.txt
WICA.399347.WRFc36.RAIN.2000-2050.txt
所以,基本上文件名遵循以下格式-(站点名称)。(站点编号)。(WRFc36)。(一些变量)。(2000-2050.txt
这些文本文件中的每一个都具有与其相似的格式,没有标题行:年月日值(每个文本文件中包含约 18500 行)
我希望 Python 搜索相似的文件名(站点名称和站点编号匹配),并从其中一个文件中挑选出第一到第三列数据并将其粘贴到新的 txt 文件中。我还想复制并粘贴站点(雨等)的每个变量的第 4 列,并将它们以特定顺序粘贴到新文件中。
我知道如何使用 csv 模块(并为空格分隔符定义新方言)从所有文件中获取数据并打印到新的文本文件,但我不确定如何为每个站点自动创建新文件名称/编号并确保我的变量以正确的顺序绘制 -
我要使用的输出是每个站点的一个文本文件(不是 5 个),格式如下(年、月、日、变量 1、变量 2、变量 3、变量 4、变量 5)约 18500 行...
我确定我在这里查看的是非常简单的东西……这似乎很简陋……但是 - 任何帮助将不胜感激!
更新
========
我已经更新了代码以反映下面的评论。
http://codepad.org/3mQEM75e
从集合导入 defaultdict 导入 glob 导入 csv
#Create dictionary of lists-- [A] = [Afilename1, Afilename2, Afilename3...]
# [B] = [Bfilename1, Bfilename2, Bfilename3...]
def get_site_files():
sites = defaultdict(list)
#to start, I have a bunch of files in this format ---
#"site name(unique)"."site num(unique)"."WRFc36"."Variable(5 for each site name)"."2000-2050"
for fname in glob.glob("*.txt"):
#split name at every instance of "."
parts = fname.split(".")
#check to make sure i only use the proper files-- having 6 parts to name and having WRFc36 as 3rd part
if len(parts)==6 and parts[2]=='WRFc36':
#Make sure site name is the full unique identifier, the first and second "parts"
sites[parts[0]+"."+parts[1]].append(fname)
return sites
#hardcode the variables for method 2, below
Var=["TAVE","RAIN","SMOIS_INST","ET","SFROFF"]
def main():
for site_name, files in get_site_files().iteritems():
print "Working on *****"+site_name+"*****"
####Method 1- I'd like to not hardcode in my variables (as in method 2), so I can use this script in other applications.
for filename in files:
reader = csv.reader(open(filename, "rb"))
WriteFile = csv.writer(open("XX_"+site_name+"_combined.txt","wb"))
for row in reader:
row = reader.next()
####Method 2 works (mostly), but skips a LOT of random lines of first file, and doesn't utilize the functionality built into my dictionary of lists...
## reader0 = csv.reader(open(site_name+".WRFc36."+Var[0]+".2000-2050.txt", "rb")) #I'd like to copy ALL columns from the first file
## reader1 = csv.reader(open(site_name+".WRFc36."+Var[1]+".2000-2050.txt", "rb")) # and just the fourth column from all the rest of the files
## reader2 = csv.reader(open(site_name+".WRFc36."+Var[2]+".2000-2050.txt", "rb")) # (the columns 1-3 are the same for all files)
## reader3 = csv.reader(open(site_name+".WRFc36."+Var[3]+".2000-2050.txt", "rb"))
## reader4 = csv.reader(open(site_name+".WRFc36."+Var[4]+".2000-2050.txt", "rb"))
## WriteFile = csv.writer(open("XX_"+site_name+"_COMBINED.txt", "wb")) #creates new command to write a text file
##
## for row in reader0:
## row = reader0.next()
## row1 = reader1.next()
## row2 = reader2.next()
## row3 = reader3.next()
## row4 = reader4.next()
## WriteFile.writerow(row + row1 + row2 + row3 + row4)
## print "***finished with site***"
if __name__=="__main__":
main()