printhead.py 文件源码

def __init__(self,file,skey='END',struct=0,show=0,check=0, verbose=0, mode=1):
        """
        """
        self.verbose = int(verbose)
        self.nbytes = 0l             # number of bytes read so far
        self.POS = []                # position of headers
        self.SIZE = []
        self.datasum = []            # datasum of headers if check!=0
        self.show = int(show)        # print the header if show!=0
        self.struct = int(struct)    # examine the structure of the file
        self.check = int(check)      # calculate datasums
        self.Extension = []          # list of HeadDict instances
        self.Mode = mode             # if 0 it is assumed that the input does
                                     # not contain data (.hdr file)
        self.KKeys = ['SIMPLE','EXTEND','NAXIS[0-9]{0,2}','BITPIX','XTENSION', 'END',]
        if skey != 'END': self.KKeys.append(skey)
        if type(file) == types.StringType:
            (self.fd, self.size) = self.openFile(file)
            if self.size == -1:
                errMsg = "*** File %s does not exists ****" % file
                raise Exception, errMsg
        elif type(file) == types.FileType:  # if fd != 0 we assume that a file object is passed
            (self.fd, self.size) = (file, file.tell())
            self.ID = self.fd.name
            self.name = self.fd.name
        elif type(file).__name__ == 'StringI': # this is a cStringIO object
            (self.fd, self.size) = (file, file.tell())
            self.ID = ""
            self.name = ""
        else:
            errMsg = "Invalid type passed to file parameter during __init__"
            raise Exception, errMsg
        self.HEAD = []               # list of list(s) of header cards
        self.analyzeStruct()