class_docstr: Class for NIfTI2 header
  
  NIfTI2 is a slightly simplified variant of NIfTI1 which replaces 32-bit
  floats with 64-bit floats, and increases some integer widths to 32 or 64
  bits.
class_docstr_tok: ["Class","for","NIfTI2","header","NIfTI2","is","a","slightly","simplified","variant","of","NIfTI1","which","replaces","32-bit","floats","with","64-bit","floats",",","and","increases","some","integer","widths","to","32","or","64","bits","."]
code: def may_contain_header(klass, binaryblock):
      if len(binaryblock) < klass.sizeof_hdr:
          return False
  
      hdr_struct = np.ndarray(
          shape=(),
          dtype=header_dtype,
          buffer=binaryblock[: klass.sizeof_hdr],
      )
      bs_hdr_struct = hdr_struct.byteswap()
      return 540 in (
          hdr_struct["sizeof_hdr"],
          bs_hdr_struct["sizeof_hdr"],
      )
  
imports: import numpy
  from .analyze import AnalyzeHeader
  from .batteryrunners import Report
  from .filebasedimages import ImageFileError
  from .nifti1 import Nifti1Header, Nifti1Image, Nifti1Pair
  from .spatialimages import HeaderDataError
label_desc: Use image node_id 6 for calling the Nifti2Header obj's underlying member method code with example usage: obj.may_contain_header(klass, binaryblock) and returns: unknown, False