python keyword specific loop for matching keyword in file

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file :

5374 12.946854617 1.1.1.1 → 2.2.2.2 LTE RRC UL_DCCH/NAS-EPS 235 -105dBm <= RSRP < -104dBm -4dB <= RSRQ < -3.5dB Detach request MeasurementReport .