firt version of a fastq parser

python/obitools3/parsers/header.pyx

@@ -0,0 +1,47 @@
+#cython: language_level=3
+
+'''
+Created on 25 mars 2016
+
+@author: coissac
+'''
+
+import re
+
+__ret__ = re.compile('''(([^ ]+)=('[^']*'|"[^"]*"|[^;]+); *)+?''')
+
+cdef object __etag__(str x):
+    try:
+        v = eval(x,{},{})
+    except:
+        v = x
+    return v
+
+cpdef tuple parseHeader(str header):
+    cdef list m 
+    cdef dict tags 
+    cdef str definition
+    cdef str ident
+    cdef str second
+    
+    m=header[1:-1].split(maxsplit=1)
+
+    ident=m[0]
+    
+    if len(m)==1:
+        tags={}
+        definition='' 
+    else:
+        second=m[1]
+        m = __ret__.findall(second)
+        
+        if m:
+            tags = dict([(a[1],__etag__(a[2])) for a in m])
+            definition = second.split(m[-1][0],1)[1].strip()
+        else:
+            tags = {}
+            definition = second.strip() 
+        
+    return ident,tags,definition
+    
+