title: hl7apy not displaying data with multiple OBX fields
body: <p>I am trying to parse hl7 files using <strong>hl7apy</strong> i am having below hl7 sample</p>
  
  <p><strong>sample :</strong></p>
  
  <pre><code>MSH|^~\&amp;|XXXX|C|PRIORITYHEALTH|PRIORITYHEALTH|20080511103530||ORU^R01|Q335939501T337311002|P|2.3|||
  PID|1||94000000000^^^Priority Health||LASTNAME^FIRSTNAME^INIT||19460101|M|||||
  PD1|1|||1234567890^PCPLAST^PCPFIRST^M^^^^^NPI|
  OBR|1||185L29839X64489JLPF~X64489^ACC_NUM|JLPF^Lipid Panel - C||||||||||||1694^DOCLAST^DOCFIRST^^MD||||||20080511103529|||
  OBX|1|NM|JHDL^HDL Cholesterol (CAD)|1|62|CD:289^mg/dL|&gt;40^&gt;40|""||""|F|||20080511103500|||^^^""|
  OBX|2|NM|JTRIG^Triglyceride (CAD)|1|72|CD:289^mg/dL|35-150^35^150|""||""|F|||20080511103500|||^^^""|
  OBX|3|NM|JVLDL^VLDL-C (calc - CAD)|1|14|CD:289^mg/dL||""||""|F|||20080511103500|||^^^""|
  OBX|4|NM|JLDL^LDL-C (calc - CAD)|1|134|CD:289^mg/dL|0-100^0^100|H||""|F|||20080511103500|||^^^""|
  OBX|5|NM|JCHO^Cholesterol (CAD)|1|210|CD:289^mg/dL|90-200^90^200|H||""|F|||20080511103500|||^^^""|
  </code></pre>
  
  <p><strong>Code:</strong></p>
  
  <pre><code>from hl7apy import parser
  from hl7apy.exceptions import UnsupportedVersion
  
  hl7 = open('sample.hl7', 'r').read()
  
  try:
      m = parser.parse_message(hl7)
  except UnsupportedVersion:
      m = parser.parse_message(hl7.replace("n", "r"))
  
    print(m.obx.obx_1.value)
  </code></pre>
  
  <p>but when i am trying to read OBX (Repeating segments) i am not getting any data, it is displaying nothing. What is am i doing wrong ?</p>